Move ARD, Arte, ZDF into their own files
[youtube-dl] / youtube_dl / InfoExtractors.py
index 6904a6686d8b6e5ab7dfe7c4bee59634df67f201..e8940ac36b806363ef0dff1fc95d9254216c3a22 100755 (executable)
@@ -21,1263 +21,27 @@ import binascii
 import urllib
 
 from .utils import *
+from .extractor.common import InfoExtractor, SearchInfoExtractor
 
+from .extractor.ard import ARDIE
+from .extractor.arte import ArteTvIE
+from .extractor.dailymotion import DailymotionIE
+from .extractor.metacafe import MetacafeIE
+from .extractor.statigram import StatigramIE
+from .extractor.photobucket import PhotobucketIE
+from .extractor.vimeo import VimeoIE
+from .extractor.yahoo import YahooIE
+from .extractor.youtube import YoutubeIE, YoutubePlaylistIE, YoutubeUserIE, YoutubeChannelIE
+from .extractor.zdf import ZDFIE
 
-class InfoExtractor(object):
-    """Information Extractor class.
 
-    Information extractors are the classes that, given a URL, extract
-    information about the video (or videos) the URL refers to. This
-    information includes the real video URL, the video title, author and
-    others. The information is stored in a dictionary which is then
-    passed to the FileDownloader. The FileDownloader processes this
-    information possibly downloading the video to the file system, among
-    other possible outcomes.
 
-    The dictionaries must include the following fields:
 
-    id:             Video identifier.
-    url:            Final video URL.
-    title:          Video title, unescaped.
-    ext:            Video filename extension.
 
-    The following fields are optional:
 
-    format:         The video format, defaults to ext (used for --get-format)
-    thumbnail:      Full URL to a video thumbnail image.
-    description:    One-line video description.
-    uploader:       Full name of the video uploader.
-    upload_date:    Video upload date (YYYYMMDD).
-    uploader_id:    Nickname or id of the video uploader.
-    location:       Physical location of the video.
-    player_url:     SWF Player URL (used for rtmpdump).
-    subtitles:      The subtitle file contents.
-    urlhandle:      [internal] The urlHandle to be used to download the file,
-                    like returned by urllib.request.urlopen
 
-    The fields should all be Unicode strings.
 
-    Subclasses of this one should re-define the _real_initialize() and
-    _real_extract() methods and define a _VALID_URL regexp.
-    Probably, they should also be added to the list of extractors.
 
-    _real_extract() must return a *list* of information dictionaries as
-    described above.
-
-    Finally, the _WORKING attribute should be set to False for broken IEs
-    in order to warn the users and skip the tests.
-    """
-
-    _ready = False
-    _downloader = None
-    _WORKING = True
-
-    def __init__(self, downloader=None):
-        """Constructor. Receives an optional downloader."""
-        self._ready = False
-        self.set_downloader(downloader)
-
-    @classmethod
-    def suitable(cls, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(cls._VALID_URL, url) is not None
-
-    @classmethod
-    def working(cls):
-        """Getter method for _WORKING."""
-        return cls._WORKING
-
-    def initialize(self):
-        """Initializes an instance (authentication, etc)."""
-        if not self._ready:
-            self._real_initialize()
-            self._ready = True
-
-    def extract(self, url):
-        """Extracts URL information and returns it in list of dicts."""
-        self.initialize()
-        return self._real_extract(url)
-
-    def set_downloader(self, downloader):
-        """Sets the downloader for this IE."""
-        self._downloader = downloader
-
-    def _real_initialize(self):
-        """Real initialization process. Redefine in subclasses."""
-        pass
-
-    def _real_extract(self, url):
-        """Real extraction process. Redefine in subclasses."""
-        pass
-
-    @property
-    def IE_NAME(self):
-        return type(self).__name__[:-2]
-
-    def _request_webpage(self, url_or_request, video_id, note=None, errnote=None):
-        """ Returns the response handle """
-        if note is None:
-            self.report_download_webpage(video_id)
-        elif note is not False:
-            self.to_screen(u'%s: %s' % (video_id, note))
-        try:
-            return compat_urllib_request.urlopen(url_or_request)
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            if errnote is None:
-                errnote = u'Unable to download webpage'
-            raise ExtractorError(u'%s: %s' % (errnote, compat_str(err)), sys.exc_info()[2])
-
-    def _download_webpage_handle(self, url_or_request, video_id, note=None, errnote=None):
-        """ Returns a tuple (page content as string, URL handle) """
-        urlh = self._request_webpage(url_or_request, video_id, note, errnote)
-        content_type = urlh.headers.get('Content-Type', '')
-        m = re.match(r'[a-zA-Z0-9_.-]+/[a-zA-Z0-9_.-]+\s*;\s*charset=(.+)', content_type)
-        if m:
-            encoding = m.group(1)
-        else:
-            encoding = 'utf-8'
-        webpage_bytes = urlh.read()
-        if self._downloader.params.get('dump_intermediate_pages', False):
-            try:
-                url = url_or_request.get_full_url()
-            except AttributeError:
-                url = url_or_request
-            self.to_screen(u'Dumping request to ' + url)
-            dump = base64.b64encode(webpage_bytes).decode('ascii')
-            self._downloader.to_screen(dump)
-        content = webpage_bytes.decode(encoding, 'replace')
-        return (content, urlh)
-
-    def _download_webpage(self, url_or_request, video_id, note=None, errnote=None):
-        """ Returns the data of the page as a string """
-        return self._download_webpage_handle(url_or_request, video_id, note, errnote)[0]
-
-    def to_screen(self, msg):
-        """Print msg to screen, prefixing it with '[ie_name]'"""
-        self._downloader.to_screen(u'[%s] %s' % (self.IE_NAME, msg))
-
-    def report_extraction(self, id_or_name):
-        """Report information extraction."""
-        self.to_screen(u'%s: Extracting information' % id_or_name)
-
-    def report_download_webpage(self, video_id):
-        """Report webpage download."""
-        self.to_screen(u'%s: Downloading webpage' % video_id)
-
-    def report_age_confirmation(self):
-        """Report attempt to confirm age."""
-        self.to_screen(u'Confirming age')
-
-    #Methods for following #608
-    #They set the correct value of the '_type' key
-    def video_result(self, video_info):
-        """Returns a video"""
-        video_info['_type'] = 'video'
-        return video_info
-    def url_result(self, url, ie=None):
-        """Returns a url that points to a page that should be processed"""
-        #TODO: ie should be the class used for getting the info
-        video_info = {'_type': 'url',
-                      'url': url,
-                      'ie_key': ie}
-        return video_info
-    def playlist_result(self, entries, playlist_id=None, playlist_title=None):
-        """Returns a playlist"""
-        video_info = {'_type': 'playlist',
-                      'entries': entries}
-        if playlist_id:
-            video_info['id'] = playlist_id
-        if playlist_title:
-            video_info['title'] = playlist_title
-        return video_info
-
-class SearchInfoExtractor(InfoExtractor):
-    """
-    Base class for paged search queries extractors.
-    They accept urls in the format _SEARCH_KEY(|all|[0-9]):{query}
-    Instances should define _SEARCH_KEY and _MAX_RESULTS.
-    """
-
-    @classmethod
-    def _make_valid_url(cls):
-        return r'%s(?P<prefix>|[1-9][0-9]*|all):(?P<query>[\s\S]+)' % cls._SEARCH_KEY
-
-    @classmethod
-    def suitable(cls, url):
-        return re.match(cls._make_valid_url(), url) is not None
-
-    def _real_extract(self, query):
-        mobj = re.match(self._make_valid_url(), query)
-        if mobj is None:
-            raise ExtractorError(u'Invalid search query "%s"' % query)
-
-        prefix = mobj.group('prefix')
-        query = mobj.group('query')
-        if prefix == '':
-            return self._get_n_results(query, 1)
-        elif prefix == 'all':
-            return self._get_n_results(query, self._MAX_RESULTS)
-        else:
-            n = int(prefix)
-            if n <= 0:
-                raise ExtractorError(u'invalid download number %s for query "%s"' % (n, query))
-            elif n > self._MAX_RESULTS:
-                self._downloader.report_warning(u'%s returns max %i results (you requested %i)' % (self._SEARCH_KEY, self._MAX_RESULTS, n))
-                n = self._MAX_RESULTS
-            return self._get_n_results(query, n)
-
-    def _get_n_results(self, query, n):
-        """Get a specified number of results for a query"""
-        raise NotImplementedError("This method must be implemented by sublclasses")
-
-
-class YoutubeIE(InfoExtractor):
-    """Information extractor for youtube.com."""
-
-    _VALID_URL = r"""^
-                     (
-                         (?:https?://)?                                       # http(s):// (optional)
-                         (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
-                            tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
-                         (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
-                         (?:                                                  # the various things that can precede the ID:
-                             (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
-                             |(?:                                             # or the v= param in all its forms
-                                 (?:watch(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
-                                 (?:\?|\#!?)                                  # the params delimiter ? or # or #!
-                                 (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
-                                 v=
-                             )
-                         )?                                                   # optional -> youtube.com/xxxx is OK
-                     )?                                                       # all until now is optional -> you can pass the naked ID
-                     ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
-                     (?(1).+)?                                                # if we found the ID, everything can follow
-                     $"""
-    _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
-    _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
-    _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
-    _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
-    _NETRC_MACHINE = 'youtube'
-    # Listed in order of quality
-    _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-    _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
-    _video_extensions = {
-        '13': '3gp',
-        '17': 'mp4',
-        '18': 'mp4',
-        '22': 'mp4',
-        '37': 'mp4',
-        '38': 'video', # You actually don't know if this will be MOV, AVI or whatever
-        '43': 'webm',
-        '44': 'webm',
-        '45': 'webm',
-        '46': 'webm',
-    }
-    _video_dimensions = {
-        '5': '240x400',
-        '6': '???',
-        '13': '???',
-        '17': '144x176',
-        '18': '360x640',
-        '22': '720x1280',
-        '34': '360x640',
-        '35': '480x854',
-        '37': '1080x1920',
-        '38': '3072x4096',
-        '43': '360x640',
-        '44': '480x854',
-        '45': '720x1280',
-        '46': '1080x1920',
-    }
-    IE_NAME = u'youtube'
-
-    @classmethod
-    def suitable(cls, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        if YoutubePlaylistIE.suitable(url): return False
-        return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
-
-    def report_lang(self):
-        """Report attempt to set language."""
-        self.to_screen(u'Setting language')
-
-    def report_login(self):
-        """Report attempt to log in."""
-        self.to_screen(u'Logging in')
-
-    def report_video_webpage_download(self, video_id):
-        """Report attempt to download video webpage."""
-        self.to_screen(u'%s: Downloading video webpage' % video_id)
-
-    def report_video_info_webpage_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self.to_screen(u'%s: Downloading video info webpage' % video_id)
-
-    def report_video_subtitles_download(self, video_id):
-        """Report attempt to download video info webpage."""
-        self.to_screen(u'%s: Checking available subtitles' % video_id)
-
-    def report_video_subtitles_request(self, video_id, sub_lang, format):
-        """Report attempt to download video info webpage."""
-        self.to_screen(u'%s: Downloading video subtitles for %s.%s' % (video_id, sub_lang, format))
-
-    def report_video_subtitles_available(self, video_id, sub_lang_list):
-        """Report available subtitles."""
-        sub_lang = ",".join(list(sub_lang_list.keys()))
-        self.to_screen(u'%s: Available subtitles for video: %s' % (video_id, sub_lang))
-
-    def report_information_extraction(self, video_id):
-        """Report attempt to extract video information."""
-        self.to_screen(u'%s: Extracting video information' % video_id)
-
-    def report_unavailable_format(self, video_id, format):
-        """Report extracted video URL."""
-        self.to_screen(u'%s: Format %s not available' % (video_id, format))
-
-    def report_rtmp_download(self):
-        """Indicate the download will use the RTMP protocol."""
-        self.to_screen(u'RTMP download detected')
-
-    def _get_available_subtitles(self, video_id):
-        self.report_video_subtitles_download(video_id)
-        request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
-        try:
-            sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'unable to download video subtitles: %s' % compat_str(err), None)
-        sub_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
-        sub_lang_list = dict((l[1], l[0]) for l in sub_lang_list)
-        if not sub_lang_list:
-            return (u'video doesn\'t have subtitles', None)
-        return sub_lang_list
-
-    def _list_available_subtitles(self, video_id):
-        sub_lang_list = self._get_available_subtitles(video_id)
-        self.report_video_subtitles_available(video_id, sub_lang_list)
-
-    def _request_subtitle(self, sub_lang, sub_name, video_id, format):
-        """
-        Return tuple:
-        (error_message, sub_lang, sub)
-        """
-        self.report_video_subtitles_request(video_id, sub_lang, format)
-        params = compat_urllib_parse.urlencode({
-            'lang': sub_lang,
-            'name': sub_name,
-            'v': video_id,
-            'fmt': format,
-        })
-        url = 'http://www.youtube.com/api/timedtext?' + params
-        try:
-            sub = compat_urllib_request.urlopen(url).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            return (u'unable to download video subtitles: %s' % compat_str(err), None, None)
-        if not sub:
-            return (u'Did not fetch video subtitles', None, None)
-        return (None, sub_lang, sub)
-
-    def _request_automatic_caption(self, video_id, webpage):
-        """We need the webpage for getting the captions url, pass it as an
-           argument to speed up the process."""
-        sub_lang = self._downloader.params.get('subtitleslang')
-        sub_format = self._downloader.params.get('subtitlesformat')
-        self.to_screen(u'%s: Looking for automatic captions' % video_id)
-        mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
-        err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
-        if mobj is None:
-            return [(err_msg, None, None)]
-        player_config = json.loads(mobj.group(1))
-        try:
-            args = player_config[u'args']
-            caption_url = args[u'ttsurl']
-            timestamp = args[u'timestamp']
-            params = compat_urllib_parse.urlencode({
-                'lang': 'en',
-                'tlang': sub_lang,
-                'fmt': sub_format,
-                'ts': timestamp,
-                'kind': 'asr',
-            })
-            subtitles_url = caption_url + '&' + params
-            sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
-            return [(None, sub_lang, sub)]
-        except KeyError:
-            return [(err_msg, None, None)]
-
-    def _extract_subtitle(self, video_id):
-        """
-        Return a list with a tuple:
-        [(error_message, sub_lang, sub)]
-        """
-        sub_lang_list = self._get_available_subtitles(video_id)
-        sub_format = self._downloader.params.get('subtitlesformat')
-        if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
-            return [(sub_lang_list[0], None, None)]
-        if self._downloader.params.get('subtitleslang', False):
-            sub_lang = self._downloader.params.get('subtitleslang')
-        elif 'en' in sub_lang_list:
-            sub_lang = 'en'
-        else:
-            sub_lang = list(sub_lang_list.keys())[0]
-        if not sub_lang in sub_lang_list:
-            return [(u'no closed captions found in the specified language "%s"' % sub_lang, None, None)]
-
-        subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
-        return [subtitle]
-
-    def _extract_all_subtitles(self, video_id):
-        sub_lang_list = self._get_available_subtitles(video_id)
-        sub_format = self._downloader.params.get('subtitlesformat')
-        if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
-            return [(sub_lang_list[0], None, None)]
-        subtitles = []
-        for sub_lang in sub_lang_list:
-            subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
-            subtitles.append(subtitle)
-        return subtitles
-
-    def _print_formats(self, formats):
-        print('Available formats:')
-        for x in formats:
-            print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
-
-    def _real_initialize(self):
-        if self._downloader is None:
-            return
-
-        username = None
-        password = None
-        downloader_params = self._downloader.params
-
-        # Attempt to use provided username and password or .netrc data
-        if downloader_params.get('username', None) is not None:
-            username = downloader_params['username']
-            password = downloader_params['password']
-        elif downloader_params.get('usenetrc', False):
-            try:
-                info = netrc.netrc().authenticators(self._NETRC_MACHINE)
-                if info is not None:
-                    username = info[0]
-                    password = info[2]
-                else:
-                    raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
-            except (IOError, netrc.NetrcParseError) as err:
-                self._downloader.report_warning(u'parsing .netrc: %s' % compat_str(err))
-                return
-
-        # Set language
-        request = compat_urllib_request.Request(self._LANG_URL)
-        try:
-            self.report_lang()
-            compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
-            return
-
-        # No authentication to be performed
-        if username is None:
-            return
-
-        request = compat_urllib_request.Request(self._LOGIN_URL)
-        try:
-            login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
-            return
-
-        galx = None
-        dsh = None
-        match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
-        if match:
-          galx = match.group(1)
-
-        match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
-        if match:
-          dsh = match.group(1)
-
-        # Log in
-        login_form_strs = {
-                u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
-                u'Email': username,
-                u'GALX': galx,
-                u'Passwd': password,
-                u'PersistentCookie': u'yes',
-                u'_utf8': u'霱',
-                u'bgresponse': u'js_disabled',
-                u'checkConnection': u'',
-                u'checkedDomains': u'youtube',
-                u'dnConn': u'',
-                u'dsh': dsh,
-                u'pstMsg': u'0',
-                u'rmShown': u'1',
-                u'secTok': u'',
-                u'signIn': u'Sign in',
-                u'timeStmp': u'',
-                u'service': u'youtube',
-                u'uilel': u'3',
-                u'hl': u'en_US',
-        }
-        # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
-        # chokes on unicode
-        login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
-        login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
-        request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
-        try:
-            self.report_login()
-            login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-            if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
-                self._downloader.report_warning(u'unable to log in: bad username or password')
-                return
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
-            return
-
-        # Confirm age
-        age_form = {
-                'next_url':     '/',
-                'action_confirm':   'Confirm',
-                }
-        request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
-        try:
-            self.report_age_confirmation()
-            age_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
-
-    def _extract_id(self, url):
-        mobj = re.match(self._VALID_URL, url, re.VERBOSE)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-        video_id = mobj.group(2)
-        return video_id
-
-    def _real_extract(self, url):
-        # Extract original video URL from URL with redirection, like age verification, using next_url parameter
-        mobj = re.search(self._NEXT_URL_RE, url)
-        if mobj:
-            url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
-        video_id = self._extract_id(url)
-
-        # Get video webpage
-        self.report_video_webpage_download(video_id)
-        url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
-        request = compat_urllib_request.Request(url)
-        try:
-            video_webpage_bytes = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
-
-        video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
-
-        # Attempt to extract SWF player URL
-        mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
-        if mobj is not None:
-            player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
-        else:
-            player_url = None
-
-        # Get video info
-        self.report_video_info_webpage_download(video_id)
-        for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
-            video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
-                    % (video_id, el_type))
-            video_info_webpage = self._download_webpage(video_info_url, video_id,
-                                    note=False,
-                                    errnote='unable to download video info webpage')
-            video_info = compat_parse_qs(video_info_webpage)
-            if 'token' in video_info:
-                break
-        if 'token' not in video_info:
-            if 'reason' in video_info:
-                raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0])
-            else:
-                raise ExtractorError(u'"token" parameter not in video info for unknown reason')
-
-        # Check for "rental" videos
-        if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
-            raise ExtractorError(u'"rental" videos not supported')
-
-        # Start extracting information
-        self.report_information_extraction(video_id)
-
-        # uploader
-        if 'author' not in video_info:
-            raise ExtractorError(u'Unable to extract uploader name')
-        video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
-
-        # uploader_id
-        video_uploader_id = None
-        mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
-        if mobj is not None:
-            video_uploader_id = mobj.group(1)
-        else:
-            self._downloader.report_warning(u'unable to extract uploader nickname')
-
-        # title
-        if 'title' not in video_info:
-            raise ExtractorError(u'Unable to extract video title')
-        video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
-
-        # thumbnail image
-        if 'thumbnail_url' not in video_info:
-            self._downloader.report_warning(u'unable to extract video thumbnail')
-            video_thumbnail = ''
-        else:   # don't panic if we can't find it
-            video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
-
-        # upload date
-        upload_date = None
-        mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
-        if mobj is not None:
-            upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
-            upload_date = unified_strdate(upload_date)
-
-        # description
-        video_description = get_element_by_id("eow-description", video_webpage)
-        if video_description:
-            video_description = clean_html(video_description)
-        else:
-            fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
-            if fd_mobj:
-                video_description = unescapeHTML(fd_mobj.group(1))
-            else:
-                video_description = u''
-
-        # subtitles
-        video_subtitles = None
-
-        if self._downloader.params.get('writesubtitles', False):
-            video_subtitles = self._extract_subtitle(video_id)
-            if video_subtitles:
-                (sub_error, sub_lang, sub) = video_subtitles[0]
-                if sub_error:
-                    # We try with the automatic captions
-                    video_subtitles = self._request_automatic_caption(video_id, video_webpage)
-                    (sub_error_auto, sub_lang, sub) = video_subtitles[0]
-                    if sub is not None:
-                        pass
-                    else:
-                        # We report the original error
-                        self._downloader.report_error(sub_error)
-
-        if self._downloader.params.get('allsubtitles', False):
-            video_subtitles = self._extract_all_subtitles(video_id)
-            for video_subtitle in video_subtitles:
-                (sub_error, sub_lang, sub) = video_subtitle
-                if sub_error:
-                    self._downloader.report_error(sub_error)
-
-        if self._downloader.params.get('listsubtitles', False):
-            sub_lang_list = self._list_available_subtitles(video_id)
-            return
-
-        if 'length_seconds' not in video_info:
-            self._downloader.report_warning(u'unable to extract video duration')
-            video_duration = ''
-        else:
-            video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
-
-        # token
-        video_token = compat_urllib_parse.unquote_plus(video_info['token'][0])
-
-        # Decide which formats to download
-        req_format = self._downloader.params.get('format', None)
-
-        if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
-            self.report_rtmp_download()
-            video_url_list = [(None, video_info['conn'][0])]
-        elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
-            url_map = {}
-            for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
-                url_data = compat_parse_qs(url_data_str)
-                if 'itag' in url_data and 'url' in url_data:
-                    url = url_data['url'][0] + '&signature=' + url_data['sig'][0]
-                    if not 'ratebypass' in url: url += '&ratebypass=yes'
-                    url_map[url_data['itag'][0]] = url
-
-            format_limit = self._downloader.params.get('format_limit', None)
-            available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
-            if format_limit is not None and format_limit in available_formats:
-                format_list = available_formats[available_formats.index(format_limit):]
-            else:
-                format_list = available_formats
-            existing_formats = [x for x in format_list if x in url_map]
-            if len(existing_formats) == 0:
-                raise ExtractorError(u'no known formats available for video')
-            if self._downloader.params.get('listformats', None):
-                self._print_formats(existing_formats)
-                return
-            if req_format is None or req_format == 'best':
-                video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
-            elif req_format == 'worst':
-                video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
-            elif req_format in ('-1', 'all'):
-                video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
-            else:
-                # Specific formats. We pick the first in a slash-delimeted sequence.
-                # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
-                req_formats = req_format.split('/')
-                video_url_list = None
-                for rf in req_formats:
-                    if rf in url_map:
-                        video_url_list = [(rf, url_map[rf])]
-                        break
-                if video_url_list is None:
-                    raise ExtractorError(u'requested format not available')
-        else:
-            raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
-
-        results = []
-        for format_param, video_real_url in video_url_list:
-            # Extension
-            video_extension = self._video_extensions.get(format_param, 'flv')
-
-            video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
-                                              self._video_dimensions.get(format_param, '???'))
-
-            results.append({
-                'id':       video_id,
-                'url':      video_real_url,
-                'uploader': video_uploader,
-                'uploader_id': video_uploader_id,
-                'upload_date':  upload_date,
-                'title':    video_title,
-                'ext':      video_extension,
-                'format':   video_format,
-                'thumbnail':    video_thumbnail,
-                'description':  video_description,
-                'player_url':   player_url,
-                'subtitles':    video_subtitles,
-                'duration':     video_duration
-            })
-        return results
-
-
-class MetacafeIE(InfoExtractor):
-    """Information Extractor for metacafe.com."""
-
-    _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
-    _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
-    _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
-    IE_NAME = u'metacafe'
-
-    def report_disclaimer(self):
-        """Report disclaimer retrieval."""
-        self.to_screen(u'Retrieving disclaimer')
-
-    def _real_initialize(self):
-        # Retrieve disclaimer
-        request = compat_urllib_request.Request(self._DISCLAIMER)
-        try:
-            self.report_disclaimer()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            raise ExtractorError(u'Unable to retrieve disclaimer: %s' % compat_str(err))
-
-        # Confirm age
-        disclaimer_form = {
-            'filters': '0',
-            'submit': "Continue - I'm over 18",
-            }
-        request = compat_urllib_request.Request(self._FILTER_POST, compat_urllib_parse.urlencode(disclaimer_form))
-        try:
-            self.report_age_confirmation()
-            disclaimer = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        video_id = mobj.group(1)
-
-        # Check if video comes from YouTube
-        mobj2 = re.match(r'^yt-(.*)$', video_id)
-        if mobj2 is not None:
-            return [self.url_result('http://www.youtube.com/watch?v=%s' % mobj2.group(1), 'Youtube')]
-
-        # Retrieve video webpage to extract further information
-        webpage = self._download_webpage('http://www.metacafe.com/watch/%s/' % video_id, video_id)
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
-        if mobj is not None:
-            mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-            video_extension = mediaURL[-3:]
-
-            # Extract gdaKey if available
-            mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
-            if mobj is None:
-                video_url = mediaURL
-            else:
-                gdaKey = mobj.group(1)
-                video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
-        else:
-            mobj = re.search(r' name="flashvars" value="(.*?)"', webpage)
-            if mobj is None:
-                raise ExtractorError(u'Unable to extract media URL')
-            vardict = compat_parse_qs(mobj.group(1))
-            if 'mediaData' not in vardict:
-                raise ExtractorError(u'Unable to extract media URL')
-            mobj = re.search(r'"mediaURL":"(?P<mediaURL>http.*?)",(.*?)"key":"(?P<key>.*?)"', vardict['mediaData'][0])
-            if mobj is None:
-                raise ExtractorError(u'Unable to extract media URL')
-            mediaURL = mobj.group('mediaURL').replace('\\/', '/')
-            video_extension = mediaURL[-3:]
-            video_url = '%s?__gda__=%s' % (mediaURL, mobj.group('key'))
-
-        mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1).decode('utf-8')
-
-        mobj = re.search(r'submitter=(.*?);', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract uploader nickname')
-        video_uploader = mobj.group(1)
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader.decode('utf-8'),
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-class DailymotionIE(InfoExtractor):
-    """Information Extractor for Dailymotion"""
-
-    _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^/]+)'
-    IE_NAME = u'dailymotion'
-
-    def _real_extract(self, url):
-        # Extract id and simplified title from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        video_id = mobj.group(1).split('_')[0].split('?')[0]
-
-        video_extension = 'mp4'
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url)
-        request.add_header('Cookie', 'family_filter=off')
-        webpage = self._download_webpage(request, video_id)
-
-        # Extract URL, uploader and title from webpage
-        self.report_extraction(video_id)
-        mobj = re.search(r'\s*var flashvars = (.*)', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract media URL')
-        flashvars = compat_urllib_parse.unquote(mobj.group(1))
-
-        for key in ['hd1080URL', 'hd720URL', 'hqURL', 'sdURL', 'ldURL', 'video_url']:
-            if key in flashvars:
-                max_quality = key
-                self.to_screen(u'Using %s' % key)
-                break
-        else:
-            raise ExtractorError(u'Unable to extract video URL')
-
-        mobj = re.search(r'"' + max_quality + r'":"(.+?)"', flashvars)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video URL')
-
-        video_url = compat_urllib_parse.unquote(mobj.group(1)).replace('\\/', '/')
-
-        # TODO: support choosing qualities
-
-        mobj = re.search(r'<meta property="og:title" content="(?P<title>[^"]*)" />', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = unescapeHTML(mobj.group('title'))
-
-        video_uploader = None
-        mobj = re.search(r'(?im)<span class="owner[^\"]+?">[^<]+?<a [^>]+?>([^<]+?)</a>', webpage)
-        if mobj is None:
-            # lookin for official user
-            mobj_official = re.search(r'<span rel="author"[^>]+?>([^<]+?)</span>', webpage)
-            if mobj_official is None:
-                self._downloader.report_warning(u'unable to extract uploader nickname')
-            else:
-                video_uploader = mobj_official.group(1)
-        else:
-            video_uploader = mobj.group(1)
-
-        video_upload_date = None
-        mobj = re.search(r'<div class="[^"]*uploaded_cont[^"]*" title="[^"]*">([0-9]{2})-([0-9]{2})-([0-9]{4})</div>', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(3) + mobj.group(2) + mobj.group(1)
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-        }]
-
-
-class PhotobucketIE(InfoExtractor):
-    """Information extractor for photobucket.com."""
-
-    # TODO: the original _VALID_URL was:
-    # r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'
-    # Check if it's necessary to keep the old extracion process
-    _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*(([\?\&]current=)|_)(?P<id>.*)\.(?P<ext>(flv)|(mp4))'
-    IE_NAME = u'photobucket'
-
-    def _real_extract(self, url):
-        # Extract id from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        video_id = mobj.group('id')
-
-        video_extension = mobj.group('ext')
-
-        # Retrieve video webpage to extract further information
-        webpage = self._download_webpage(url, video_id)
-
-        # Extract URL, uploader, and title from webpage
-        self.report_extraction(video_id)
-        # We try first by looking the javascript code:
-        mobj = re.search(r'Pb\.Data\.Shared\.put\(Pb\.Data\.Shared\.MEDIA, (?P<json>.*?)\);', webpage)
-        if mobj is not None:
-            info = json.loads(mobj.group('json'))
-            return [{
-                'id':       video_id,
-                'url':      info[u'downloadUrl'],
-                'uploader': info[u'username'],
-                'upload_date':  datetime.date.fromtimestamp(info[u'creationDate']).strftime('%Y%m%d'),
-                'title':    info[u'title'],
-                'ext':      video_extension,
-                'thumbnail': info[u'thumbUrl'],
-            }]
-
-        # We try looking in other parts of the webpage
-        mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract media URL')
-        mediaURL = compat_urllib_parse.unquote(mobj.group(1))
-
-        video_url = mediaURL
-
-        mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1).decode('utf-8')
-
-        video_uploader = mobj.group(2).decode('utf-8')
-
-        return [{
-            'id':       video_id.decode('utf-8'),
-            'url':      video_url.decode('utf-8'),
-            'uploader': video_uploader,
-            'upload_date':  None,
-            'title':    video_title,
-            'ext':      video_extension.decode('utf-8'),
-        }]
-
-
-class YahooIE(InfoExtractor):
-    """Information extractor for screen.yahoo.com."""
-    _VALID_URL = r'http://screen\.yahoo\.com/.*?-(?P<id>\d*?)\.html'
-
-    def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-        video_id = mobj.group('id')
-        webpage = self._download_webpage(url, video_id)
-        m_id = re.search(r'YUI\.namespace\("Media"\)\.CONTENT_ID = "(?P<new_id>.+?)";', webpage)
-
-        if m_id is None: 
-            # TODO: Check which url parameters are required
-            info_url = 'http://cosmos.bcst.yahoo.com/rest/v2/pops;lmsoverride=1;outputformat=mrss;cb=974419660;id=%s;rd=news.yahoo.com;datacontext=mdb;lg=KCa2IihxG3qE60vQ7HtyUy' % video_id
-            webpage = self._download_webpage(info_url, video_id, u'Downloading info webpage')
-            info_re = r'''<title><!\[CDATA\[(?P<title>.*?)\]\]></title>.*
-                        <description><!\[CDATA\[(?P<description>.*?)\]\]></description>.*
-                        <media:pubStart><!\[CDATA\[(?P<date>.*?)\ .*\]\]></media:pubStart>.*
-                        <media:content\ medium="image"\ url="(?P<thumb>.*?)"\ name="LARGETHUMB"
-                        '''
-            self.report_extraction(video_id)
-            m_info = re.search(info_re, webpage, re.VERBOSE|re.DOTALL)
-            if m_info is None:
-                raise ExtractorError(u'Unable to extract video info')
-            video_title = m_info.group('title')
-            video_description = m_info.group('description')
-            video_thumb = m_info.group('thumb')
-            video_date = m_info.group('date')
-            video_date = datetime.datetime.strptime(video_date, '%m/%d/%Y').strftime('%Y%m%d')
-    
-            # TODO: Find a way to get mp4 videos
-            rest_url = 'http://cosmos.bcst.yahoo.com/rest/v2/pops;element=stream;outputformat=mrss;id=%s;lmsoverride=1;bw=375;dynamicstream=1;cb=83521105;tech=flv,mp4;rd=news.yahoo.com;datacontext=mdb;lg=KCa2IihxG3qE60vQ7HtyUy' % video_id
-            webpage = self._download_webpage(rest_url, video_id, u'Downloading video url webpage')
-            m_rest = re.search(r'<media:content url="(?P<url>.*?)" path="(?P<path>.*?)"', webpage)
-            video_url = m_rest.group('url')
-            video_path = m_rest.group('path')
-            if m_rest is None:
-                raise ExtractorError(u'Unable to extract video url')
-
-        else: # We have to use a different method if another id is defined
-            long_id = m_id.group('new_id')
-            info_url = 'http://video.query.yahoo.com/v1/public/yql?q=SELECT%20*%20FROM%20yahoo.media.video.streams%20WHERE%20id%3D%22' + long_id + '%22%20AND%20format%3D%22mp4%2Cflv%22%20AND%20protocol%3D%22rtmp%2Chttp%22%20AND%20plrs%3D%2286Gj0vCaSzV_Iuf6hNylf2%22%20AND%20acctid%3D%22389%22%20AND%20plidl%3D%22%22%20AND%20pspid%3D%22792700001%22%20AND%20offnetwork%3D%22false%22%20AND%20site%3D%22ivy%22%20AND%20lang%3D%22en-US%22%20AND%20region%3D%22US%22%20AND%20override%3D%22none%22%3B&env=prod&format=json&callback=YUI.Env.JSONP.yui_3_8_1_1_1368368376830_335'
-            webpage = self._download_webpage(info_url, video_id, u'Downloading info json')
-            json_str = re.search(r'YUI.Env.JSONP.yui.*?\((.*?)\);', webpage).group(1)
-            info = json.loads(json_str)
-            res = info[u'query'][u'results'][u'mediaObj'][0]
-            stream = res[u'streams'][0]
-            video_path = stream[u'path']
-            video_url = stream[u'host']
-            meta = res[u'meta']
-            video_title = meta[u'title']
-            video_description = meta[u'description']
-            video_thumb = meta[u'thumbnail']
-            video_date = None # I can't find it
-
-        info_dict = {
-                     'id': video_id,
-                     'url': video_url,
-                     'play_path': video_path,
-                     'title':video_title,
-                     'description': video_description,
-                     'thumbnail': video_thumb,
-                     'upload_date': video_date,
-                     'ext': 'flv',
-                     }
-        return info_dict
-
-class VimeoIE(InfoExtractor):
-    """Information extractor for vimeo.com."""
-
-    # _VALID_URL matches Vimeo URLs
-    _VALID_URL = r'(?P<proto>https?://)?(?:(?:www|player)\.)?vimeo(?P<pro>pro)?\.com/(?:(?:(?:groups|album)/[^/]+)|(?:.*?)/)?(?P<direct_link>play_redirect_hls\?clip_id=)?(?:videos?/)?(?P<id>[0-9]+)'
-    IE_NAME = u'vimeo'
-
-    def _real_extract(self, url, new_video=True):
-        # Extract ID from URL
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        video_id = mobj.group('id')
-        if not mobj.group('proto'):
-            url = 'https://' + url
-        if mobj.group('direct_link') or mobj.group('pro'):
-            url = 'https://vimeo.com/' + video_id
-
-        # Retrieve video webpage to extract further information
-        request = compat_urllib_request.Request(url, None, std_headers)
-        webpage = self._download_webpage(request, video_id)
-
-        # Now we begin extracting as much information as we can from what we
-        # retrieved. First we extract the information common to all extractors,
-        # and latter we extract those that are Vimeo specific.
-        self.report_extraction(video_id)
-
-        # Extract the config JSON
-        try:
-            config = webpage.split(' = {config:')[1].split(',assets:')[0]
-            config = json.loads(config)
-        except:
-            if re.search('The creator of this video has not given you permission to embed it on this domain.', webpage):
-                raise ExtractorError(u'The author has restricted the access to this video, try with the "--referer" option')
-            else:
-                raise ExtractorError(u'Unable to extract info section')
-
-        # Extract title
-        video_title = config["video"]["title"]
-
-        # Extract uploader and uploader_id
-        video_uploader = config["video"]["owner"]["name"]
-        video_uploader_id = config["video"]["owner"]["url"].split('/')[-1] if config["video"]["owner"]["url"] else None
-
-        # Extract video thumbnail
-        video_thumbnail = config["video"]["thumbnail"]
-
-        # Extract video description
-        video_description = get_element_by_attribute("itemprop", "description", webpage)
-        if video_description: video_description = clean_html(video_description)
-        else: video_description = u''
-
-        # Extract upload date
-        video_upload_date = None
-        mobj = re.search(r'<meta itemprop="dateCreated" content="(\d{4})-(\d{2})-(\d{2})T', webpage)
-        if mobj is not None:
-            video_upload_date = mobj.group(1) + mobj.group(2) + mobj.group(3)
-
-        # Vimeo specific: extract request signature and timestamp
-        sig = config['request']['signature']
-        timestamp = config['request']['timestamp']
-
-        # Vimeo specific: extract video codec and quality information
-        # First consider quality, then codecs, then take everything
-        # TODO bind to format param
-        codecs = [('h264', 'mp4'), ('vp8', 'flv'), ('vp6', 'flv')]
-        files = { 'hd': [], 'sd': [], 'other': []}
-        for codec_name, codec_extension in codecs:
-            if codec_name in config["video"]["files"]:
-                if 'hd' in config["video"]["files"][codec_name]:
-                    files['hd'].append((codec_name, codec_extension, 'hd'))
-                elif 'sd' in config["video"]["files"][codec_name]:
-                    files['sd'].append((codec_name, codec_extension, 'sd'))
-                else:
-                    files['other'].append((codec_name, codec_extension, config["video"]["files"][codec_name][0]))
-
-        for quality in ('hd', 'sd', 'other'):
-            if len(files[quality]) > 0:
-                video_quality = files[quality][0][2]
-                video_codec = files[quality][0][0]
-                video_extension = files[quality][0][1]
-                self.to_screen(u'%s: Downloading %s file at %s quality' % (video_id, video_codec.upper(), video_quality))
-                break
-        else:
-            raise ExtractorError(u'No known codec found')
-
-        video_url = "http://player.vimeo.com/play_redirect?clip_id=%s&sig=%s&time=%s&quality=%s&codecs=%s&type=moogaloop_local&embed_location=" \
-                    %(video_id, sig, timestamp, video_quality, video_codec.upper())
-
-        return [{
-            'id':       video_id,
-            'url':      video_url,
-            'uploader': video_uploader,
-            'uploader_id': video_uploader_id,
-            'upload_date':  video_upload_date,
-            'title':    video_title,
-            'ext':      video_extension,
-            'thumbnail':    video_thumbnail,
-            'description':  video_description,
-        }]
-
-
-class ArteTvIE(InfoExtractor):
-    """arte.tv information extractor."""
-
-    _VALID_URL = r'(?:http://)?videos\.arte\.tv/(?:fr|de)/videos/.*'
-    _LIVE_URL = r'index-[0-9]+\.html$'
-
-    IE_NAME = u'arte.tv'
-
-    def fetch_webpage(self, url):
-        request = compat_urllib_request.Request(url)
-        try:
-            self.report_download_webpage(url)
-            webpage = compat_urllib_request.urlopen(request).read()
-        except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-            raise ExtractorError(u'Unable to retrieve video webpage: %s' % compat_str(err))
-        except ValueError as err:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-        return webpage
-
-    def grep_webpage(self, url, regex, regexFlags, matchTuples):
-        page = self.fetch_webpage(url)
-        mobj = re.search(regex, page, regexFlags)
-        info = {}
-
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        for (i, key, err) in matchTuples:
-            if mobj.group(i) is None:
-                raise ExtractorError(err)
-            else:
-                info[key] = mobj.group(i)
-
-        return info
-
-    def extractLiveStream(self, url):
-        video_lang = url.split('/')[-4]
-        info = self.grep_webpage(
-            url,
-            r'src="(.*?/videothek_js.*?\.js)',
-            0,
-            [
-                (1, 'url', u'Invalid URL: %s' % url)
-            ]
-        )
-        http_host = url.split('/')[2]
-        next_url = 'http://%s%s' % (http_host, compat_urllib_parse.unquote(info.get('url')))
-        info = self.grep_webpage(
-            next_url,
-            r'(s_artestras_scst_geoFRDE_' + video_lang + '.*?)\'.*?' +
-                '(http://.*?\.swf).*?' +
-                '(rtmp://.*?)\'',
-            re.DOTALL,
-            [
-                (1, 'path',   u'could not extract video path: %s' % url),
-                (2, 'player', u'could not extract video player: %s' % url),
-                (3, 'url',    u'could not extract video url: %s' % url)
-            ]
-        )
-        video_url = u'%s/%s' % (info.get('url'), info.get('path'))
-
-    def extractPlus7Stream(self, url):
-        video_lang = url.split('/')[-3]
-        info = self.grep_webpage(
-            url,
-            r'param name="movie".*?videorefFileUrl=(http[^\'"&]*)',
-            0,
-            [
-                (1, 'url', u'Invalid URL: %s' % url)
-            ]
-        )
-        next_url = compat_urllib_parse.unquote(info.get('url'))
-        info = self.grep_webpage(
-            next_url,
-            r'<video lang="%s" ref="(http[^\'"&]*)' % video_lang,
-            0,
-            [
-                (1, 'url', u'Could not find <video> tag: %s' % url)
-            ]
-        )
-        next_url = compat_urllib_parse.unquote(info.get('url'))
-
-        info = self.grep_webpage(
-            next_url,
-            r'<video id="(.*?)".*?>.*?' +
-                '<name>(.*?)</name>.*?' +
-                '<dateVideo>(.*?)</dateVideo>.*?' +
-                '<url quality="hd">(.*?)</url>',
-            re.DOTALL,
-            [
-                (1, 'id',    u'could not extract video id: %s' % url),
-                (2, 'title', u'could not extract video title: %s' % url),
-                (3, 'date',  u'could not extract video date: %s' % url),
-                (4, 'url',   u'could not extract video url: %s' % url)
-            ]
-        )
-
-        return {
-            'id':           info.get('id'),
-            'url':          compat_urllib_parse.unquote(info.get('url')),
-            'uploader':     u'arte.tv',
-            'upload_date':  unified_strdate(info.get('date')),
-            'title':        info.get('title').decode('utf-8'),
-            'ext':          u'mp4',
-            'format':       u'NA',
-            'player_url':   None,
-        }
-
-    def _real_extract(self, url):
-        video_id = url.split('/')[-1]
-        self.report_extraction(video_id)
-
-        if re.search(self._LIVE_URL, video_id) is not None:
-            self.extractLiveStream(url)
-            return
-        else:
-            info = self.extractPlus7Stream(url)
-
-        return [info]
 
 
 class GenericIE(InfoExtractor):
@@ -1376,6 +140,13 @@ class GenericIE(InfoExtractor):
         if mobj is None:
             # Try to find twitter cards info
             mobj = re.search(r'<meta (?:property|name)="twitter:player:stream" (?:content|value)="(.+?)"', webpage)
+        if mobj is None:
+            # We look for Open Graph info:
+            # We have to match any number spaces between elements, some sites try to align them (eg.: statigr.am)
+            m_video_type = re.search(r'<meta.*?property="og:video:type".*?content="video/(.*?)"', webpage)
+            # We only look in og:video if the MIME type is a video, don't try if it's a Flash player:
+            if m_video_type is not None:
+                mobj = re.search(r'<meta.*?property="og:video".*?content="(.*?)"', webpage)
         if mobj is None:
             raise ExtractorError(u'Invalid URL: %s' % url)
 
@@ -1397,16 +168,12 @@ class GenericIE(InfoExtractor):
         #   Site Name | Video Title
         #   Video Title - Tagline | Site Name
         # and so on and so forth; it's just not practical
-        mobj = re.search(r'<title>(.*)</title>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1)
+        video_title = self._html_search_regex(r'<title>(.*)</title>',
+            webpage, u'video title')
 
         # video uploader is domain name
-        mobj = re.match(r'(?:https?://)?([^/]*)/.*', url)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_uploader = mobj.group(1)
+        video_uploader = self._search_regex(r'(?:https?://)?([^/]*)/.*',
+            url, u'video uploader')
 
         return [{
             'id':       video_id,
@@ -1497,218 +264,34 @@ class YahooSearchIE(SearchInfoExtractor):
 
     _MAX_RESULTS = 1000
     IE_NAME = u'screen.yahoo:search'
-    _SEARCH_KEY = 'yvsearch'
-
-    def _get_n_results(self, query, n):
-        """Get a specified number of results for a query"""
-
-        res = {
-            '_type': 'playlist',
-            'id': query,
-            'entries': []
-        }
-        for pagenum in itertools.count(0): 
-            result_url = u'http://video.search.yahoo.com/search/?p=%s&fr=screen&o=js&gs=0&b=%d' % (compat_urllib_parse.quote_plus(query), pagenum * 30)
-            webpage = self._download_webpage(result_url, query,
-                                             note='Downloading results page '+str(pagenum+1))
-            info = json.loads(webpage)
-            m = info[u'm']
-            results = info[u'results']
-
-            for (i, r) in enumerate(results):
-                if (pagenum * 30) +i >= n:
-                    break
-                mobj = re.search(r'(?P<url>screen\.yahoo\.com/.*?-\d*?\.html)"', r)
-                e = self.url_result('http://' + mobj.group('url'), 'Yahoo')
-                res['entries'].append(e)
-            if (pagenum * 30 +i >= n) or (m[u'last'] >= (m[u'total'] -1 )):
-                break
-
-        return res
-
-
-class YoutubePlaylistIE(InfoExtractor):
-    """Information Extractor for YouTube playlists."""
-
-    _VALID_URL = r"""(?:
-                        (?:https?://)?
-                        (?:\w+\.)?
-                        youtube\.com/
-                        (?:
-                           (?:course|view_play_list|my_playlists|artist|playlist|watch)
-                           \? (?:.*?&)*? (?:p|a|list)=
-                        |  p/
-                        )
-                        ((?:PL|EC|UU)?[0-9A-Za-z-_]{10,})
-                        .*
-                     |
-                        ((?:PL|EC|UU)[0-9A-Za-z-_]{10,})
-                     )"""
-    _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json'
-    _MAX_RESULTS = 50
-    IE_NAME = u'youtube:playlist'
-
-    @classmethod
-    def suitable(cls, url):
-        """Receives a URL and returns True if suitable for this IE."""
-        return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
-
-    def _real_extract(self, url):
-        # Extract playlist id
-        mobj = re.match(self._VALID_URL, url, re.VERBOSE)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        # Download playlist videos from API
-        playlist_id = mobj.group(1) or mobj.group(2)
-        page_num = 1
-        videos = []
-
-        while True:
-            url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, self._MAX_RESULTS * (page_num - 1) + 1)
-            page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
-
-            try:
-                response = json.loads(page)
-            except ValueError as err:
-                raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
-
-            if 'feed' not in response:
-                raise ExtractorError(u'Got a malformed response from YouTube API')
-            playlist_title = response['feed']['title']['$t']
-            if 'entry' not in response['feed']:
-                # Number of videos is a multiple of self._MAX_RESULTS
-                break
-
-            videos += [ (entry['yt$position']['$t'], entry['content']['src'])
-                        for entry in response['feed']['entry']
-                        if 'content' in entry ]
-
-            if len(response['feed']['entry']) < self._MAX_RESULTS:
-                break
-            page_num += 1
-
-        videos = [v[1] for v in sorted(videos)]
-
-        url_results = [self.url_result(url, 'Youtube') for url in videos]
-        return [self.playlist_result(url_results, playlist_id, playlist_title)]
-
-
-class YoutubeChannelIE(InfoExtractor):
-    """Information Extractor for YouTube channels."""
-
-    _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
-    _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
-    _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
-    _MORE_PAGES_URL = 'http://www.youtube.com/channel_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'
-    IE_NAME = u'youtube:channel'
-
-    def extract_videos_from_page(self, page):
-        ids_in_page = []
-        for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
-            if mobj.group(1) not in ids_in_page:
-                ids_in_page.append(mobj.group(1))
-        return ids_in_page
-
-    def _real_extract(self, url):
-        # Extract channel id
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        # Download channel page
-        channel_id = mobj.group(1)
-        video_ids = []
-        pagenum = 1
-
-        url = self._TEMPLATE_URL % (channel_id, pagenum)
-        page = self._download_webpage(url, channel_id,
-                                      u'Downloading page #%s' % pagenum)
-
-        # Extract video identifiers
-        ids_in_page = self.extract_videos_from_page(page)
-        video_ids.extend(ids_in_page)
-
-        # Download any subsequent channel pages using the json-based channel_ajax query
-        if self._MORE_PAGES_INDICATOR in page:
-            while True:
-                pagenum = pagenum + 1
-
-                url = self._MORE_PAGES_URL % (pagenum, channel_id)
-                page = self._download_webpage(url, channel_id,
-                                              u'Downloading page #%s' % pagenum)
-
-                page = json.loads(page)
-
-                ids_in_page = self.extract_videos_from_page(page['content_html'])
-                video_ids.extend(ids_in_page)
-
-                if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
-                    break
-
-        self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
-
-        urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
-        url_entries = [self.url_result(url, 'Youtube') for url in urls]
-        return [self.playlist_result(url_entries, channel_id)]
-
-
-class YoutubeUserIE(InfoExtractor):
-    """Information Extractor for YouTube users."""
-
-    _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
-    _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
-    _GDATA_PAGE_SIZE = 50
-    _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
-    _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
-    IE_NAME = u'youtube:user'
-
-    def _real_extract(self, url):
-        # Extract username
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-
-        username = mobj.group(1)
-
-        # Download video ids using YouTube Data API. Result size per
-        # query is limited (currently to 50 videos) so we need to query
-        # page by page until there are no video ids - it means we got
-        # all of them.
-
-        video_ids = []
-        pagenum = 0
-
-        while True:
-            start_index = pagenum * self._GDATA_PAGE_SIZE + 1
-
-            gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
-            page = self._download_webpage(gdata_url, username,
-                                          u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
-
-            # Extract video identifiers
-            ids_in_page = []
-
-            for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                if mobj.group(1) not in ids_in_page:
-                    ids_in_page.append(mobj.group(1))
+    _SEARCH_KEY = 'yvsearch'
 
-            video_ids.extend(ids_in_page)
+    def _get_n_results(self, query, n):
+        """Get a specified number of results for a query"""
 
-            # A little optimization - if current page is not
-            # "full", ie. does not contain PAGE_SIZE video ids then
-            # we can assume that this page is the last one - there
-            # are no more ids on further pages - no need to query
-            # again.
+        res = {
+            '_type': 'playlist',
+            'id': query,
+            'entries': []
+        }
+        for pagenum in itertools.count(0): 
+            result_url = u'http://video.search.yahoo.com/search/?p=%s&fr=screen&o=js&gs=0&b=%d' % (compat_urllib_parse.quote_plus(query), pagenum * 30)
+            webpage = self._download_webpage(result_url, query,
+                                             note='Downloading results page '+str(pagenum+1))
+            info = json.loads(webpage)
+            m = info[u'm']
+            results = info[u'results']
 
-            if len(ids_in_page) < self._GDATA_PAGE_SIZE:
+            for (i, r) in enumerate(results):
+                if (pagenum * 30) +i >= n:
+                    break
+                mobj = re.search(r'(?P<url>screen\.yahoo\.com/.*?-\d*?\.html)"', r)
+                e = self.url_result('http://' + mobj.group('url'), 'Yahoo')
+                res['entries'].append(e)
+            if (pagenum * 30 +i >= n) or (m[u'last'] >= (m[u'total'] -1 )):
                 break
 
-            pagenum += 1
-
-        urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
-        url_results = [self.url_result(url, 'Youtube') for url in urls]
-        return [self.playlist_result(url_results, playlist_title = username)]
+        return res
 
 
 class BlipTVUserIE(InfoExtractor):
@@ -1805,10 +388,7 @@ class DepositFilesIE(InfoExtractor):
         file_extension = os.path.splitext(file_url)[1][1:]
 
         # Search for file title
-        mobj = re.search(r'<b title="(.*?)">', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        file_title = mobj.group(1).decode('utf-8')
+        file_title = self._search_regex(r'<b title="(.*?)">', webpage, u'title')
 
         return [{
             'id':       file_id.decode('utf-8'),
@@ -1902,10 +482,8 @@ class FacebookIE(InfoExtractor):
         video_duration = int(video_data['video_duration'])
         thumbnail = video_data['thumbnail_src']
 
-        m = re.search('<h2 class="uiHeaderTitle">([^<]+)</h2>', webpage)
-        if not m:
-            raise ExtractorError(u'Cannot find title in webpage')
-        video_title = unescapeHTML(m.group(1))
+        video_title = self._html_search_regex('<h2 class="uiHeaderTitle">([^<]+)</h2>',
+            webpage, u'title')
 
         info = {
             'id': video_id,
@@ -2067,15 +645,10 @@ class MyVideoIE(InfoExtractor):
             self.report_extraction(video_id)
             video_url = mobj.group(1) + '.flv'
 
-            mobj = re.search('<title>([^<]+)</title>', webpage)
-            if mobj is None:
-                raise ExtractorError(u'Unable to extract title')
-            video_title = mobj.group(1)
+            video_title = self._html_search_regex('<title>([^<]+)</title>',
+                webpage, u'title')
 
-            mobj = re.search('[.](.+?)$', video_url)
-            if mobj is None:
-                raise ExtractorError(u'Unable to extract extention')
-            video_ext = mobj.group(1)
+            video_ext = self._search_regex('[.](.+?)$', video_url, u'extension')
 
             return [{
                 'id':       video_id,
@@ -2123,25 +696,23 @@ class MyVideoIE(InfoExtractor):
         # extracting infos
         self.report_extraction(video_id)
 
+        video_url = None
         mobj = re.search('connectionurl=\'(.*?)\'', dec_data)
-        if mobj is None:
-            raise ExtractorError(u'unable to extract rtmpurl')
-        video_rtmpurl = compat_urllib_parse.unquote(mobj.group(1))
-        if 'myvideo2flash' in video_rtmpurl:
-            self._downloader.report_warning(u'forcing RTMPT ...')
-            video_rtmpurl = video_rtmpurl.replace('rtmpe://', 'rtmpt://')
-
-        # extract non rtmp videos
-        if (video_rtmpurl is None) or (video_rtmpurl == ''):
+        if mobj:
+            video_url = compat_urllib_parse.unquote(mobj.group(1))
+            if 'myvideo2flash' in video_url:
+                self._downloader.report_warning(u'forcing RTMPT ...')
+                video_url = video_url.replace('rtmpe://', 'rtmpt://')
+
+        if not video_url:
+            # extract non rtmp videos
             mobj = re.search('path=\'(http.*?)\' source=\'(.*?)\'', dec_data)
             if mobj is None:
                 raise ExtractorError(u'unable to extract url')
-            video_rtmpurl = compat_urllib_parse.unquote(mobj.group(1)) + compat_urllib_parse.unquote(mobj.group(2))
+            video_url = compat_urllib_parse.unquote(mobj.group(1)) + compat_urllib_parse.unquote(mobj.group(2))
 
-        mobj = re.search('source=\'(.*?)\'', dec_data)
-        if mobj is None:
-            raise ExtractorError(u'unable to extract swfobj')
-        video_file     = compat_urllib_parse.unquote(mobj.group(1))
+        video_file = self._search_regex('source=\'(.*?)\'', dec_data, u'video file')
+        video_file = compat_urllib_parse.unquote(video_file)
 
         if not video_file.endswith('f4m'):
             ppath, prefix = video_file.split('.')
@@ -2153,20 +724,16 @@ class MyVideoIE(InfoExtractor):
                 video_filepath + video_file
             ).replace('.f4m', '.m3u8')
 
-        mobj = re.search('swfobject.embedSWF\(\'(.+?)\'', webpage)
-        if mobj is None:
-            raise ExtractorError(u'unable to extract swfobj')
-        video_swfobj = compat_urllib_parse.unquote(mobj.group(1))
+        video_swfobj = self._search_regex('swfobject.embedSWF\(\'(.+?)\'', webpage, u'swfobj')
+        video_swfobj = compat_urllib_parse.unquote(video_swfobj)
 
-        mobj = re.search("<h1(?: class='globalHd')?>(.*?)</h1>", webpage)
-        if mobj is None:
-            raise ExtractorError(u'unable to extract title')
-        video_title = mobj.group(1)
+        video_title = self._html_search_regex("<h1(?: class='globalHd')?>(.*?)</h1>",
+            webpage, u'title')
 
         return [{
             'id':                 video_id,
-            'url':                video_rtmpurl,
-            'tc_url':             video_rtmpurl,
+            'url':                video_url,
+            'tc_url':             video_url,
             'uploader':           None,
             'upload_date':        None,
             'title':              video_title,
@@ -2177,6 +744,7 @@ class MyVideoIE(InfoExtractor):
             'player_url':         video_swfobj,
         }]
 
+
 class ComedyCentralIE(InfoExtractor):
     """Information extractor for The Daily Show and Colbert Report """
 
@@ -2358,19 +926,25 @@ class EscapistIE(InfoExtractor):
         showName = mobj.group('showname')
         videoId = mobj.group('episode')
 
-        self.report_extraction(showName)
-        webPage = self._download_webpage(url, showName)
+        self.report_extraction(videoId)
+        webpage = self._download_webpage(url, videoId)
+
+        videoDesc = self._html_search_regex('<meta name="description" content="([^"]*)"',
+            webpage, u'description', fatal=False)
+
+        imgUrl = self._html_search_regex('<meta property="og:image" content="([^"]*)"',
+            webpage, u'thumbnail', fatal=False)
+
+        playerUrl = self._html_search_regex('<meta property="og:video" content="([^"]*)"',
+            webpage, u'player url')
+
+        title = self._html_search_regex('<meta name="title" content="([^"]*)"',
+            webpage, u'player url').split(' : ')[-1]
 
-        descMatch = re.search('<meta name="description" content="([^"]*)"', webPage)
-        description = unescapeHTML(descMatch.group(1))
-        imgMatch = re.search('<meta property="og:image" content="([^"]*)"', webPage)
-        imgUrl = unescapeHTML(imgMatch.group(1))
-        playerUrlMatch = re.search('<meta property="og:video" content="([^"]*)"', webPage)
-        playerUrl = unescapeHTML(playerUrlMatch.group(1))
-        configUrlMatch = re.search('config=(.*)$', playerUrl)
-        configUrl = compat_urllib_parse.unquote(configUrlMatch.group(1))
+        configUrl = self._search_regex('config=(.*)$', playerUrl, u'config url')
+        configUrl = compat_urllib_parse.unquote(configUrl)
 
-        configJSON = self._download_webpage(configUrl, showName,
+        configJSON = self._download_webpage(configUrl, videoId,
                                             u'Downloading configuration',
                                             u'unable to download configuration')
 
@@ -2390,10 +964,10 @@ class EscapistIE(InfoExtractor):
             'url': videoUrl,
             'uploader': showName,
             'upload_date': None,
-            'title': showName,
+            'title': title,
             'ext': 'mp4',
             'thumbnail': imgUrl,
-            'description': description,
+            'description': videoDesc,
             'player_url': playerUrl,
         }
 
@@ -2478,26 +1052,17 @@ class XVideosIE(InfoExtractor):
 
         self.report_extraction(video_id)
 
-
         # Extract video URL
-        mobj = re.search(r'flv_url=(.+?)&', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video url')
-        video_url = compat_urllib_parse.unquote(mobj.group(1))
-
+        video_url = compat_urllib_parse.unquote(self._search_regex(r'flv_url=(.+?)&',
+            webpage, u'video URL'))
 
         # Extract title
-        mobj = re.search(r'<title>(.*?)\s+-\s+XVID', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video title')
-        video_title = mobj.group(1)
-
+        video_title = self._html_search_regex(r'<title>(.*?)\s+-\s+XVID',
+            webpage, u'title')
 
         # Extract video thumbnail
-        mobj = re.search(r'http://(?:img.*?\.)xvideos.com/videos/thumbs/[a-fA-F0-9]+/[a-fA-F0-9]+/[a-fA-F0-9]+/[a-fA-F0-9]+/([a-fA-F0-9.]+jpg)', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video thumbnail')
-        video_thumbnail = mobj.group(0)
+        video_thumbnail = self._search_regex(r'http://(?:img.*?\.)xvideos.com/videos/thumbs/[a-fA-F0-9]+/[a-fA-F0-9]+/[a-fA-F0-9]+/[a-fA-F0-9]+/([a-fA-F0-9.]+jpg)',
+            webpage, u'thumbnail', fatal=False)
 
         info = {
             'id': video_id,
@@ -2654,16 +1219,12 @@ class InfoQIE(InfoExtractor):
         video_url = 'rtmpe://video.infoq.com/cfx/st/' + real_id
 
         # Extract title
-        mobj = re.search(r'contentTitle = "(.*?)";', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video title')
-        video_title = mobj.group(1)
+        video_title = self._search_regex(r'contentTitle = "(.*?)";',
+            webpage, u'title')
 
         # Extract description
-        video_description = u'No description available.'
-        mobj = re.search(r'<meta name="description" content="(.*)"(?:\s*/)?>', webpage)
-        if mobj is not None:
-            video_description = mobj.group(1)
+        video_description = self._html_search_regex(r'<meta name="description" content="(.*)"(?:\s*/)?>',
+            webpage, u'description', fatal=False)
 
         video_filename = video_url.split('/')[-1]
         video_id, extension = video_filename.split('.')
@@ -2834,15 +1395,10 @@ class StanfordOpenClassroomIE(InfoExtractor):
                                         note='Downloading course info page',
                                         errnote='Unable to download course info page')
 
-            m = re.search('<h1>([^<]+)</h1>', coursepage)
-            if m:
-                info['title'] = unescapeHTML(m.group(1))
-            else:
-                info['title'] = info['id']
+            info['title'] = self._html_search_regex('<h1>([^<]+)</h1>', coursepage, 'title', default=info['id'])
 
-            m = re.search('<description>([^<]+)</description>', coursepage)
-            if m:
-                info['description'] = unescapeHTML(m.group(1))
+            info['description'] = self._html_search_regex('<description>([^<]+)</description>',
+                coursepage, u'description', fatal=False)
 
             links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
             info['list'] = [
@@ -2903,25 +1459,17 @@ class MTVIE(InfoExtractor):
 
         webpage = self._download_webpage(url, video_id)
 
-        mobj = re.search(r'<meta name="mtv_vt" content="([^"]+)"/>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract song name')
-        song_name = unescapeHTML(mobj.group(1).decode('iso-8859-1'))
-        mobj = re.search(r'<meta name="mtv_an" content="([^"]+)"/>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract performer')
-        performer = unescapeHTML(mobj.group(1).decode('iso-8859-1'))
-        video_title = performer + ' - ' + song_name
+        song_name = self._html_search_regex(r'<meta name="mtv_vt" content="([^"]+)"/>',
+            webpage, u'song name', fatal=False)
 
-        mobj = re.search(r'<meta name="mtvn_uri" content="([^"]+)"/>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to mtvn_uri')
-        mtvn_uri = mobj.group(1)
+        video_title = self._html_search_regex(r'<meta name="mtv_an" content="([^"]+)"/>',
+            webpage, u'title')
 
-        mobj = re.search(r'MTVN.Player.defaultPlaylistId = ([0-9]+);', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract content id')
-        content_id = mobj.group(1)
+        mtvn_uri = self._html_search_regex(r'<meta name="mtvn_uri" content="([^"]+)"/>',
+            webpage, u'mtvn_uri', fatal=False)
+
+        content_id = self._search_regex(r'MTVN.Player.defaultPlaylistId = ([0-9]+);',
+            webpage, u'content id', fatal=False)
 
         videogen_url = 'http://www.mtv.com/player/includes/mediaGen.jhtml?uri=' + mtvn_uri + '&id=' + content_id + '&vid=' + video_id + '&ref=www.mtvn.com&viewUri=' + mtvn_uri
         self.report_extraction(video_id)
@@ -3069,20 +1617,15 @@ class XNXXIE(InfoExtractor):
         # Get webpage content
         webpage = self._download_webpage(url, video_id)
 
-        result = re.search(self.VIDEO_URL_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video url')
-        video_url = compat_urllib_parse.unquote(result.group(1))
+        video_url = self._search_regex(self.VIDEO_URL_RE,
+            webpage, u'video URL')
+        video_url = compat_urllib_parse.unquote(video_url)
 
-        result = re.search(self.VIDEO_TITLE_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video title')
-        video_title = result.group(1)
+        video_title = self._html_search_regex(self.VIDEO_TITLE_RE,
+            webpage, u'title')
 
-        result = re.search(self.VIDEO_THUMB_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video thumbnail')
-        video_thumbnail = result.group(1)
+        video_thumbnail = self._search_regex(self.VIDEO_THUMB_RE,
+            webpage, u'thumbnail', fatal=False)
 
         return [{
             'id': video_id,
@@ -3102,26 +1645,6 @@ class GooglePlusIE(InfoExtractor):
     _VALID_URL = r'(?:https://)?plus\.google\.com/(?:[^/]+/)*?posts/(\w+)'
     IE_NAME = u'plus.google'
 
-    def report_extract_entry(self, url):
-        """Report downloading extry"""
-        self.to_screen(u'Downloading entry: %s' % url)
-
-    def report_date(self, upload_date):
-        """Report downloading extry"""
-        self.to_screen(u'Entry date: %s' % upload_date)
-
-    def report_uploader(self, uploader):
-        """Report downloading extry"""
-        self.to_screen(u'Uploader: %s' % uploader)
-
-    def report_title(self, video_title):
-        """Report downloading extry"""
-        self.to_screen(u'Title: %s' % video_title)
-
-    def report_extract_vid_page(self, video_page):
-        """Report information extraction."""
-        self.to_screen(u'Extracting video page: %s' % video_page)
-
     def _real_extract(self, url):
         # Extract id from URL
         mobj = re.match(self._VALID_URL, url)
@@ -3134,47 +1657,31 @@ class GooglePlusIE(InfoExtractor):
         video_extension = 'flv'
 
         # Step 1, Retrieve post webpage to extract further information
-        self.report_extract_entry(post_url)
         webpage = self._download_webpage(post_url, video_id, u'Downloading entry webpage')
 
+        self.report_extraction(video_id)
+
         # Extract update date
-        upload_date = None
-        pattern = 'title="Timestamp">(.*?)</a>'
-        mobj = re.search(pattern, webpage)
-        if mobj:
-            upload_date = mobj.group(1)
+        upload_date = self._html_search_regex('title="Timestamp">(.*?)</a>',
+            webpage, u'upload date', fatal=False)
+        if upload_date:
             # Convert timestring to a format suitable for filename
             upload_date = datetime.datetime.strptime(upload_date, "%Y-%m-%d")
             upload_date = upload_date.strftime('%Y%m%d')
-        self.report_date(upload_date)
 
         # Extract uploader
-        uploader = None
-        pattern = r'rel\="author".*?>(.*?)</a>'
-        mobj = re.search(pattern, webpage)
-        if mobj:
-            uploader = mobj.group(1)
-        self.report_uploader(uploader)
+        uploader = self._html_search_regex(r'rel\="author".*?>(.*?)</a>',
+            webpage, u'uploader', fatal=False)
 
         # Extract title
         # Get the first line for title
-        video_title = u'NA'
-        pattern = r'<meta name\=\"Description\" content\=\"(.*?)[\n<"]'
-        mobj = re.search(pattern, webpage)
-        if mobj:
-            video_title = mobj.group(1)
-        self.report_title(video_title)
+        video_title = self._html_search_regex(r'<meta name\=\"Description\" content\=\"(.*?)[\n<"]',
+            webpage, 'title', default=u'NA')
 
         # Step 2, Stimulate clicking the image box to launch video
-        pattern = '"(https\://plus\.google\.com/photos/.*?)",,"image/jpeg","video"\]'
-        mobj = re.search(pattern, webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video page URL')
-
-        video_page = mobj.group(1)
+        video_page = self._search_regex('"(https\://plus\.google\.com/photos/.*?)",,"image/jpeg","video"\]',
+            webpage, u'video page URL')
         webpage = self._download_webpage(video_page, video_id, u'Downloading video page')
-        self.report_extract_vid_page(video_page)
-
 
         # Extract video links on video page
         """Extract video links of all sizes"""
@@ -3207,7 +1714,7 @@ class GooglePlusIE(InfoExtractor):
         }]
 
 class NBAIE(InfoExtractor):
-    _VALID_URL = r'^(?:https?://)?(?:watch\.|www\.)?nba\.com/(?:nba/)?video(/[^?]*)(\?.*)?$'
+    _VALID_URL = r'^(?:https?://)?(?:watch\.|www\.)?nba\.com/(?:nba/)?video(/[^?]*?)(?:/index\.html)?(?:\?.*)?$'
     IE_NAME = u'nba'
 
     def _real_extract(self, url):
@@ -3216,28 +1723,27 @@ class NBAIE(InfoExtractor):
             raise ExtractorError(u'Invalid URL: %s' % url)
 
         video_id = mobj.group(1)
-        if video_id.endswith('/index.html'):
-            video_id = video_id[:-len('/index.html')]
 
         webpage = self._download_webpage(url, video_id)
 
         video_url = u'http://ht-mobile.cdn.turner.com/nba/big' + video_id + '_nba_1280x720.mp4'
-        def _findProp(rexp, default=None):
-            m = re.search(rexp, webpage)
-            if m:
-                return unescapeHTML(m.group(1))
-            else:
-                return default
 
         shortened_video_id = video_id.rpartition('/')[2]
-        title = _findProp(r'<meta property="og:title" content="(.*?)"', shortened_video_id).replace('NBA.com: ', '')
+        title = self._html_search_regex(r'<meta property="og:title" content="(.*?)"',
+            webpage, 'title', default=shortened_video_id).replace('NBA.com: ', '')
+
+        # It isn't there in the HTML it returns to us
+        # uploader_date = self._html_search_regex(r'<b>Date:</b> (.*?)</div>', webpage, 'upload_date', fatal=False)
+
+        description = self._html_search_regex(r'<meta name="description" (?:content|value)="(.*?)" />', webpage, 'description', fatal=False)
+
         info = {
             'id': shortened_video_id,
             'url': video_url,
             'ext': 'mp4',
             'title': title,
-            'uploader_date': _findProp(r'<b>Date:</b> (.*?)</div>'),
-            'description': _findProp(r'<div class="description">(.*?)</h1>'),
+            # 'uploader_date': uploader_date,
+            'description': description,
         }
         return [info]
 
@@ -3385,30 +1891,21 @@ class FunnyOrDieIE(InfoExtractor):
         video_id = mobj.group('id')
         webpage = self._download_webpage(url, video_id)
 
-        m = re.search(r'<video[^>]*>\s*<source[^>]*>\s*<source src="(?P<url>[^"]+)"', webpage, re.DOTALL)
-        if not m:
-            raise ExtractorError(u'Unable to find video information')
-        video_url = unescapeHTML(m.group('url'))
+        video_url = self._html_search_regex(r'<video[^>]*>\s*<source[^>]*>\s*<source src="(?P<url>[^"]+)"',
+            webpage, u'video URL', flags=re.DOTALL)
 
-        m = re.search(r"<h1 class='player_page_h1'.*?>(?P<title>.*?)</h1>", webpage, flags=re.DOTALL)
-        if not m:
-            m = re.search(r'<title>(?P<title>[^<]+?)</title>', webpage)
-            if not m:
-                raise ExtractorError(u'Cannot find video title')
-        title = clean_html(m.group('title'))
+        title = self._html_search_regex((r"<h1 class='player_page_h1'.*?>(?P<title>.*?)</h1>",
+            r'<title>(?P<title>[^<]+?)</title>'), webpage, 'title', flags=re.DOTALL)
 
-        m = re.search(r'<meta property="og:description" content="(?P<desc>.*?)"', webpage)
-        if m:
-            desc = unescapeHTML(m.group('desc'))
-        else:
-            desc = None
+        video_description = self._html_search_regex(r'<meta property="og:description" content="(?P<desc>.*?)"',
+            webpage, u'description', fatal=False, flags=re.DOTALL)
 
         info = {
             'id': video_id,
             'url': video_url,
             'ext': 'mp4',
             'title': title,
-            'description': desc,
+            'description': video_description,
         }
         return [info]
 
@@ -3419,6 +1916,8 @@ class SteamIE(InfoExtractor):
                 (?P<gameID>\d+)/?
                 (?P<videoID>\d*)(?P<extra>\??) #For urltype == video we sometimes get the videoID
                 """
+    _VIDEO_PAGE_TEMPLATE = 'http://store.steampowered.com/video/%s/'
+    _AGECHECK_TEMPLATE = 'http://store.steampowered.com/agecheck/video/%s/?snr=1_agecheck_agecheck__age-gate&ageDay=1&ageMonth=January&ageYear=1970'
 
     @classmethod
     def suitable(cls, url):
@@ -3428,11 +1927,19 @@ class SteamIE(InfoExtractor):
     def _real_extract(self, url):
         m = re.match(self._VALID_URL, url, re.VERBOSE)
         gameID = m.group('gameID')
-        videourl = 'http://store.steampowered.com/agecheck/video/%s/?snr=1_agecheck_agecheck__age-gate&ageDay=1&ageMonth=January&ageYear=1970' % gameID
-        self.report_age_confirmation()
+
+        videourl = self._VIDEO_PAGE_TEMPLATE % gameID
         webpage = self._download_webpage(videourl, gameID)
-        game_title = re.search(r'<h2 class="pageheader">(?P<game_title>.*?)</h2>', webpage).group('game_title')
-        
+
+        if re.search('<h2>Please enter your birth date to continue:</h2>', webpage) is not None:
+            videourl = self._AGECHECK_TEMPLATE % gameID
+            self.report_age_confirmation()
+            webpage = self._download_webpage(videourl, gameID)
+
+        self.report_extraction(gameID)
+        game_title = self._html_search_regex(r'<h2 class="pageheader">(.*?)</h2>',
+                                             webpage, 'game title')
+
         urlRE = r"'movie_(?P<videoID>\d+)': \{\s*FILENAME: \"(?P<videoURL>[\w:/\.\?=]+)\"(,\s*MOVIE_NAME: \"(?P<videoName>[\w:/\.\?=\+-]+)\")?\s*\},"
         mweb = re.finditer(urlRE, webpage)
         namesRE = r'<span class="title">(?P<videoName>.+?)</span>'
@@ -3464,27 +1971,29 @@ class UstreamIE(InfoExtractor):
     def _real_extract(self, url):
         m = re.match(self._VALID_URL, url)
         video_id = m.group('videoID')
+
         video_url = u'http://tcdn.ustream.tv/video/%s' % video_id
         webpage = self._download_webpage(url, video_id)
+
         self.report_extraction(video_id)
-        try:
-            m = re.search(r'data-title="(?P<title>.+)"',webpage)
-            title = m.group('title')
-            m = re.search(r'data-content-type="channel".*?>(?P<uploader>.*?)</a>',
-                          webpage, re.DOTALL)
-            uploader = unescapeHTML(m.group('uploader').strip())
-            m = re.search(r'<link rel="image_src" href="(?P<thumb>.*?)"', webpage)
-            thumb = m.group('thumb')
-        except AttributeError:
-            raise ExtractorError(u'Unable to extract info')
+
+        video_title = self._html_search_regex(r'data-title="(?P<title>.+)"',
+            webpage, u'title')
+
+        uploader = self._html_search_regex(r'data-content-type="channel".*?>(?P<uploader>.*?)</a>',
+            webpage, u'uploader', fatal=False, flags=re.DOTALL)
+
+        thumbnail = self._html_search_regex(r'<link rel="image_src" href="(?P<thumb>.*?)"',
+            webpage, u'thumbnail', fatal=False)
+
         info = {
-                'id':video_id,
-                'url':video_url,
+                'id': video_id,
+                'url': video_url,
                 'ext': 'flv',
-                'title': title,
+                'title': video_title,
                 'uploader': uploader,
-                'thumbnail': thumb,
-                  }
+                'thumbnail': thumbnail,
+               }
         return info
 
 class WorldStarHipHopIE(InfoExtractor):
@@ -3492,45 +2001,36 @@ class WorldStarHipHopIE(InfoExtractor):
     IE_NAME = u'WorldStarHipHop'
 
     def _real_extract(self, url):
-        _src_url = r'so\.addVariable\("file","(.*?)"\)'
-
         m = re.match(self._VALID_URL, url)
         video_id = m.group('id')
 
-        webpage_src = self._download_webpage(url, video_id) 
+        webpage_src = self._download_webpage(url, video_id)
 
-        mobj = re.search(_src_url, webpage_src)
+        video_url = self._search_regex(r'so\.addVariable\("file","(.*?)"\)',
+            webpage_src, u'video URL')
 
-        if mobj is not None:
-            video_url = mobj.group(1)
-            if 'mp4' in video_url:
-                ext = 'mp4'
-            else:
-                ext = 'flv'
+        if 'mp4' in video_url:
+            ext = 'mp4'
         else:
-            raise ExtractorError(u'Cannot find video url for %s' % video_id)
+            ext = 'flv'
 
-        mobj = re.search(r"<title>(.*)</title>", webpage_src)
-
-        if mobj is None:
-            raise ExtractorError(u'Cannot determine title')
-        title = mobj.group(1)
+        video_title = self._html_search_regex(r"<title>(.*)</title>",
+            webpage_src, u'title')
 
-        mobj = re.search(r'rel="image_src" href="(.*)" />', webpage_src)
         # Getting thumbnail and if not thumbnail sets correct title for WSHH candy video.
-        if mobj is not None:
-            thumbnail = mobj.group(1)
-        else:
+        thumbnail = self._html_search_regex(r'rel="image_src" href="(.*)" />',
+            webpage_src, u'thumbnail', fatal=False)
+
+        if not thumbnail:
             _title = r"""candytitles.*>(.*)</span>"""
             mobj = re.search(_title, webpage_src)
             if mobj is not None:
-                title = mobj.group(1)
-            thumbnail = None
+                video_title = mobj.group(1)
 
         results = [{
                     'id': video_id,
                     'url' : video_url,
-                    'title' : title,
+                    'title' : video_title,
                     'thumbnail' : thumbnail,
                     'ext' : ext,
                     }]
@@ -3544,10 +2044,9 @@ class RBMARadioIE(InfoExtractor):
         video_id = m.group('videoID')
 
         webpage = self._download_webpage(url, video_id)
-        m = re.search(r'<script>window.gon = {.*?};gon\.show=(.+?);</script>', webpage)
-        if not m:
-            raise ExtractorError(u'Cannot find metadata')
-        json_data = m.group(1)
+
+        json_data = self._search_regex(r'window\.gon.*?gon\.show=(.+?);$',
+            webpage, u'json data', flags=re.MULTILINE)
 
         try:
             data = json.loads(json_data)
@@ -3594,42 +2093,33 @@ class YouPornIE(InfoExtractor):
         mobj = re.match(self._VALID_URL, url)
         if mobj is None:
             raise ExtractorError(u'Invalid URL: %s' % url)
-
         video_id = mobj.group('videoid')
 
         req = compat_urllib_request.Request(url)
         req.add_header('Cookie', 'age_verified=1')
         webpage = self._download_webpage(req, video_id)
 
-        # Get the video title
-        result = re.search(r'<h1.*?>(?P<title>.*)</h1>', webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video title')
-        video_title = result.group('title').strip()
-
-        # Get the video date
-        result = re.search(r'Date:</label>(?P<date>.*) </li>', webpage)
-        if result is None:
-            self._downloader.report_warning(u'unable to extract video date')
-            upload_date = None
-        else:
-            upload_date = unified_strdate(result.group('date').strip())
+        # Get JSON parameters
+        json_params = self._search_regex(r'var currentVideo = new Video\((.*)\);', webpage, u'JSON parameters')
+        try:
+            params = json.loads(json_params)
+        except:
+            raise ExtractorError(u'Invalid JSON')
 
-        # Get the video uploader
-        result = re.search(r'Submitted:</label>(?P<uploader>.*)</li>', webpage)
-        if result is None:
-            self._downloader.report_warning(u'unable to extract uploader')
-            video_uploader = None
-        else:
-            video_uploader = result.group('uploader').strip()
-            video_uploader = clean_html( video_uploader )
+        self.report_extraction(video_id)
+        try:
+            video_title = params['title']
+            upload_date = unified_strdate(params['release_date_f'])
+            video_description = params['description']
+            video_uploader = params['submitted_by']
+            thumbnail = params['thumbnails'][0]['image']
+        except KeyError:
+            raise ExtractorError('Missing JSON parameter: ' + sys.exc_info()[1])
 
         # Get all of the formats available
         DOWNLOAD_LIST_RE = r'(?s)<ul class="downloadList">(?P<download_list>.*?)</ul>'
-        result = re.search(DOWNLOAD_LIST_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract download list')
-        download_list_html = result.group('download_list').strip()
+        download_list_html = self._search_regex(DOWNLOAD_LIST_RE,
+            webpage, u'download list').strip()
 
         # Get all of the links from the page
         LINK_RE = r'(?s)<a href="(?P<url>[^"]+)">'
@@ -3653,19 +2143,18 @@ class YouPornIE(InfoExtractor):
             size = format[0]
             bitrate = format[1]
             format = "-".join( format )
-            title = u'%s-%s-%s' % (video_title, size, bitrate)
+            title = u'%s-%s-%s' % (video_title, size, bitrate)
 
             formats.append({
                 'id': video_id,
                 'url': video_url,
                 'uploader': video_uploader,
                 'upload_date': upload_date,
-                'title': title,
+                'title': video_title,
                 'ext': extension,
                 'format': format,
-                'thumbnail': None,
-                'description': None,
-                'player_url': None
+                'thumbnail': thumbnail,
+                'description': video_description
             })
 
         if self._downloader.params.get('listformats', None):
@@ -3706,17 +2195,13 @@ class PornotubeIE(InfoExtractor):
 
         # Get the video URL
         VIDEO_URL_RE = r'url: "(?P<url>http://video[0-9].pornotube.com/.+\.flv)",'
-        result = re.search(VIDEO_URL_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video url')
-        video_url = compat_urllib_parse.unquote(result.group('url'))
+        video_url = self._search_regex(VIDEO_URL_RE, webpage, u'video url')
+        video_url = compat_urllib_parse.unquote(video_url)
 
         #Get the uploaded date
         VIDEO_UPLOADED_RE = r'<div class="video_added_by">Added (?P<date>[0-9\/]+) by'
-        result = re.search(VIDEO_UPLOADED_RE, webpage)
-        if result is None:
-            raise ExtractorError(u'Unable to extract video title')
-        upload_date = unified_strdate(result.group('date'))
+        upload_date = self._html_search_regex(VIDEO_UPLOADED_RE, webpage, u'upload date', fatal=False)
+        if upload_date: upload_date = unified_strdate(upload_date)
 
         info = {'id': video_id,
                 'url': video_url,
@@ -3743,10 +2228,8 @@ class YouJizzIE(InfoExtractor):
         webpage = self._download_webpage(url, video_id)
 
         # Get the video title
-        result = re.search(r'<title>(?P<title>.*)</title>', webpage)
-        if result is None:
-            raise ExtractorError(u'ERROR: unable to extract video title')
-        video_title = result.group('title').strip()
+        video_title = self._html_search_regex(r'<title>(?P<title>.*)</title>',
+            webpage, u'title').strip()
 
         # Get the embed page
         result = re.search(r'https?://www.youjizz.com/videos/embed/(?P<videoid>[0-9]+)', webpage)
@@ -3759,10 +2242,8 @@ class YouJizzIE(InfoExtractor):
         webpage = self._download_webpage(embed_page_url, video_id)
 
         # Get the video URL
-        result = re.search(r'so.addVariable\("file",encodeURIComponent\("(?P<source>[^"]+)"\)\);', webpage)
-        if result is None:
-            raise ExtractorError(u'ERROR: unable to extract video url')
-        video_url = result.group('source')
+        video_url = self._search_regex(r'so.addVariable\("file",encodeURIComponent\("(?P<source>[^"]+)"\)\);',
+            webpage, u'video URL')
 
         info = {'id': video_id,
                 'url': video_url,
@@ -3785,10 +2266,7 @@ class EightTracksIE(InfoExtractor):
 
         webpage = self._download_webpage(url, playlist_id)
 
-        m = re.search(r"PAGE.mix = (.*?);\n", webpage, flags=re.DOTALL)
-        if not m:
-            raise ExtractorError(u'Cannot find trax information')
-        json_like = m.group(1)
+        json_like = self._search_regex(r"PAGE.mix = (.*?);\n", webpage, u'trax information', flags=re.DOTALL)
         data = json.loads(json_like)
 
         session = str(random.randint(0, 1000000000))
@@ -3824,18 +2302,22 @@ class KeekIE(InfoExtractor):
     def _real_extract(self, url):
         m = re.match(self._VALID_URL, url)
         video_id = m.group('videoID')
+
         video_url = u'http://cdn.keek.com/keek/video/%s' % video_id
         thumbnail = u'http://cdn.keek.com/keek/thumbnail/%s/w100/h75' % video_id
         webpage = self._download_webpage(url, video_id)
-        m = re.search(r'<meta property="og:title" content="(?P<title>.*?)"', webpage)
-        title = unescapeHTML(m.group('title'))
-        m = re.search(r'<div class="user-name-and-bio">[\S\s]+?<h2>(?P<uploader>.+?)</h2>', webpage)
-        uploader = clean_html(m.group('uploader'))
+
+        video_title = self._html_search_regex(r'<meta property="og:title" content="(?P<title>.*?)"',
+            webpage, u'title')
+
+        uploader = self._html_search_regex(r'<div class="user-name-and-bio">[\S\s]+?<h2>(?P<uploader>.+?)</h2>',
+            webpage, u'uploader', fatal=False)
+
         info = {
                 'id': video_id,
                 'url': video_url,
                 'ext': 'mp4',
-                'title': title,
+                'title': video_title,
                 'thumbnail': thumbnail,
                 'uploader': uploader
         }
@@ -3867,10 +2349,6 @@ class TEDIE(InfoExtractor):
             self.to_screen(u'Getting info of playlist %s: "%s"' % (playlist_id,name))
             return [self._playlist_videos_info(url,name,playlist_id)]
 
-    def _talk_video_link(self,mediaSlug):
-        '''Returns the video link for that mediaSlug'''
-        return 'http://download.ted.com/talks/%s.mp4' % mediaSlug
-
     def _playlist_videos_info(self,url,name,playlist_id=0):
         '''Returns the videos of the playlist'''
         video_RE=r'''
@@ -3883,9 +2361,8 @@ class TEDIE(InfoExtractor):
         m_videos=re.finditer(video_RE,webpage,re.VERBOSE)
         m_names=re.finditer(video_name_RE,webpage)
 
-        playlist_RE = r'div class="headline">(\s*?)<h1>(\s*?)<span>(?P<playlist_title>.*?)</span>'
-        m_playlist = re.search(playlist_RE, webpage)
-        playlist_title = m_playlist.group('playlist_title')
+        playlist_title = self._html_search_regex(r'div class="headline">\s*?<h1>\s*?<span>(.*?)</span>',
+                                                 webpage, 'playlist title')
 
         playlist_entries = []
         for m_video, m_name in zip(m_videos,m_names):
@@ -3896,27 +2373,28 @@ class TEDIE(InfoExtractor):
 
     def _talk_info(self, url, video_id=0):
         """Return the video for the talk in the url"""
-        m=re.match(self._VALID_URL, url,re.VERBOSE)
-        videoName=m.group('name')
-        webpage=self._download_webpage(url, video_id, 'Downloading \"%s\" page' % videoName)
+        m = re.match(self._VALID_URL, url,re.VERBOSE)
+        video_name = m.group('name')
+        webpage = self._download_webpage(url, video_id, 'Downloading \"%s\" page' % video_name)
+        self.report_extraction(video_name)
         # If the url includes the language we get the title translated
-        title_RE=r'<span id="altHeadline" >(?P<title>.*)</span>'
-        title=re.search(title_RE, webpage).group('title')
-        info_RE=r'''<script\ type="text/javascript">var\ talkDetails\ =(.*?)
-                        "id":(?P<videoID>[\d]+).*?
-                        "mediaSlug":"(?P<mediaSlug>[\w\d]+?)"'''
-        thumb_RE=r'</span>[\s.]*</div>[\s.]*<img src="(?P<thumbnail>.*?)"'
-        thumb_match=re.search(thumb_RE,webpage)
-        info_match=re.search(info_RE,webpage,re.VERBOSE)
-        video_id=info_match.group('videoID')
-        mediaSlug=info_match.group('mediaSlug')
-        video_url=self._talk_video_link(mediaSlug)
+        title = self._html_search_regex(r'<span id="altHeadline" >(?P<title>.*)</span>',
+                                        webpage, 'title')
+        json_data = self._search_regex(r'<script.*?>var talkDetails = ({.*?})</script>',
+                                    webpage, 'json data')
+        info = json.loads(json_data)
+        desc = self._html_search_regex(r'<div class="talk-intro">.*?<p.*?>(.*?)</p>',
+                                       webpage, 'description', flags = re.DOTALL)
+        
+        thumbnail = self._search_regex(r'</span>[\s.]*</div>[\s.]*<img src="(.*?)"',
+                                       webpage, 'thumbnail')
         info = {
-                'id': video_id,
-                'url': video_url,
+                'id': info['id'],
+                'url': info['htmlStreams'][-1]['file'],
                 'ext': 'mp4',
                 'title': title,
-                'thumbnail': thumb_match.group('thumbnail')
+                'thumbnail': thumbnail,
+                'description': desc,
                 }
         return info
 
@@ -3982,10 +2460,9 @@ class SpiegelIE(InfoExtractor):
         video_id = m.group('videoID')
 
         webpage = self._download_webpage(url, video_id)
-        m = re.search(r'<div class="module-title">(.*?)</div>', webpage)
-        if not m:
-            raise ExtractorError(u'Cannot find title')
-        video_title = unescapeHTML(m.group(1))
+
+        video_title = self._html_search_regex(r'<div class="module-title">(.*?)</div>',
+            webpage, u'title')
 
         xml_url = u'http://video2.spiegel.de/flash/' + video_id + u'.xml'
         xml_code = self._download_webpage(xml_url, video_id,
@@ -4021,135 +2498,30 @@ class LiveLeakIE(InfoExtractor):
 
         webpage = self._download_webpage(url, video_id)
 
-        m = re.search(r'file: "(.*?)",', webpage)
-        if not m:
-            raise ExtractorError(u'Unable to find video url')
-        video_url = m.group(1)
+        video_url = self._search_regex(r'file: "(.*?)",',
+            webpage, u'video URL')
 
-        m = re.search(r'<meta property="og:title" content="(?P<title>.*?)"', webpage)
-        if not m:
-            raise ExtractorError(u'Cannot find video title')
-        title = unescapeHTML(m.group('title')).replace('LiveLeak.com -', '').strip()
+        video_title = self._html_search_regex(r'<meta property="og:title" content="(?P<title>.*?)"',
+            webpage, u'title').replace('LiveLeak.com -', '').strip()
 
-        m = re.search(r'<meta property="og:description" content="(?P<desc>.*?)"', webpage)
-        if m:
-            desc = unescapeHTML(m.group('desc'))
-        else:
-            desc = None
+        video_description = self._html_search_regex(r'<meta property="og:description" content="(?P<desc>.*?)"',
+            webpage, u'description', fatal=False)
 
-        m = re.search(r'By:.*?(\w+)</a>', webpage)
-        if m:
-            uploader = clean_html(m.group(1))
-        else:
-            uploader = None
+        video_uploader = self._html_search_regex(r'By:.*?(\w+)</a>',
+            webpage, u'uploader', fatal=False)
 
         info = {
             'id':  video_id,
             'url': video_url,
             'ext': 'mp4',
-            'title': title,
-            'description': desc,
-            'uploader': uploader
+            'title': video_title,
+            'description': video_description,
+            'uploader': video_uploader
         }
 
         return [info]
 
-class ARDIE(InfoExtractor):
-    _VALID_URL = r'^(?:https?://)?(?:(?:www\.)?ardmediathek\.de|mediathek\.daserste\.de)/(?:.*/)(?P<video_id>[^/\?]+)(?:\?.*)?'
-    _TITLE = r'<h1(?: class="boxTopHeadline")?>(?P<title>.*)</h1>'
-    _MEDIA_STREAM = r'mediaCollection\.addMediaStream\((?P<media_type>\d+), (?P<quality>\d+), "(?P<rtmp_url>[^"]*)", "(?P<video_url>[^"]*)", "[^"]*"\)'
-
-    def _real_extract(self, url):
-        # determine video id from url
-        m = re.match(self._VALID_URL, url)
-
-        numid = re.search(r'documentId=([0-9]+)', url)
-        if numid:
-            video_id = numid.group(1)
-        else:
-            video_id = m.group('video_id')
-
-        # determine title and media streams from webpage
-        html = self._download_webpage(url, video_id)
-        title = re.search(self._TITLE, html).group('title')
-        streams = [m.groupdict() for m in re.finditer(self._MEDIA_STREAM, html)]
-        if not streams:
-            assert '"fsk"' in html
-            raise ExtractorError(u'This video is only available after 8:00 pm')
-
-        # choose default media type and highest quality for now
-        stream = max([s for s in streams if int(s["media_type"]) == 0],
-                     key=lambda s: int(s["quality"]))
-
-        # there's two possibilities: RTMP stream or HTTP download
-        info = {'id': video_id, 'title': title, 'ext': 'mp4'}
-        if stream['rtmp_url']:
-            self.to_screen(u'RTMP download detected')
-            assert stream['video_url'].startswith('mp4:')
-            info["url"] = stream["rtmp_url"]
-            info["play_path"] = stream['video_url']
-        else:
-            assert stream["video_url"].endswith('.mp4')
-            info["url"] = stream["video_url"]
-        return [info]
-
-class ZDFIE(InfoExtractor):
-    _VALID_URL = r'^http://www\.zdf\.de\/ZDFmediathek\/(.*beitrag\/video\/)(?P<video_id>[^/\?]+)(?:\?.*)?'
-    _TITLE = r'<h1(?: class="beitragHeadline")?>(?P<title>.*)</h1>'
-    _MEDIA_STREAM = r'<a href="(?P<video_url>.+(?P<media_type>.streaming).+/zdf/(?P<quality>[^\/]+)/[^"]*)".+class="play".+>'
-    _MMS_STREAM = r'href="(?P<video_url>mms://[^"]*)"'
-    _RTSP_STREAM = r'(?P<video_url>rtsp://[^"]*.mp4)'
-
-    def _real_extract(self, url):
-        mobj = re.match(self._VALID_URL, url)
-        if mobj is None:
-            raise ExtractorError(u'Invalid URL: %s' % url)
-        video_id = mobj.group('video_id')
-
-        html = self._download_webpage(url, video_id)
-        streams = [m.groupdict() for m in re.finditer(self._MEDIA_STREAM, html)]
-        if streams is None:
-            raise ExtractorError(u'No media url found.')
-
-        # s['media_type'] == 'wstreaming' -> use 'Windows Media Player' and mms url
-        # s['media_type'] == 'hstreaming' -> use 'Quicktime' and rtsp url
-        # choose first/default media type and highest quality for now
-        for s in streams:        #find 300 - dsl1000mbit
-            if s['quality'] == '300' and s['media_type'] == 'wstreaming':
-                stream_=s
-                break
-        for s in streams:        #find veryhigh - dsl2000mbit
-            if s['quality'] == 'veryhigh' and s['media_type'] == 'wstreaming': # 'hstreaming' - rtsp is not working
-                stream_=s
-                break
-        if stream_ is None:
-            raise ExtractorError(u'No stream found.')
-
-        media_link = self._download_webpage(stream_['video_url'], video_id,'Get stream URL')
-
-        self.report_extraction(video_id)
-        mobj = re.search(self._TITLE, html)
-        if mobj is None:
-            raise ExtractorError(u'Cannot extract title')
-        title = unescapeHTML(mobj.group('title'))
-
-        mobj = re.search(self._MMS_STREAM, media_link)
-        if mobj is None:
-            mobj = re.search(self._RTSP_STREAM, media_link)
-            if mobj is None:
-                raise ExtractorError(u'Cannot extract mms:// or rtsp:// URL')
-        mms_url = mobj.group('video_url')
-
-        mobj = re.search('(.*)[.](?P<ext>[^.]+)', mms_url)
-        if mobj is None:
-            raise ExtractorError(u'Cannot extract extention')
-        ext = mobj.group('ext')
 
-        return [{'id': video_id,
-                 'url': mms_url,
-                 'title': title,
-                 'ext': ext
-                 }]
 
 class TumblrIE(InfoExtractor):
     _VALID_URL = r'http://(?P<blog_name>.*?)\.tumblr\.com/((post)|(video))/(?P<id>\d*)/(.*?)'
@@ -4165,23 +2537,23 @@ class TumblrIE(InfoExtractor):
         re_video = r'src=\\x22(?P<video_url>http://%s\.tumblr\.com/video_file/%s/(.*?))\\x22 type=\\x22video/(?P<ext>.*?)\\x22' % (blog, video_id)
         video = re.search(re_video, webpage)
         if video is None:
-            self.to_screen("No video found")
-            return []
+           raise ExtractorError(u'Unable to extract video')
         video_url = video.group('video_url')
         ext = video.group('ext')
 
-        re_thumb = r'posters(.*?)\[\\x22(?P<thumb>.*?)\\x22'  # We pick the first poster
-        thumb = re.search(re_thumb, webpage).group('thumb').replace('\\', '')
+        video_thumbnail = self._search_regex(r'posters(.*?)\[\\x22(?P<thumb>.*?)\\x22',
+            webpage, u'thumbnail', fatal=False)  # We pick the first poster
+        if video_thumbnail: video_thumbnail = video_thumbnail.replace('\\', '')
 
         # The only place where you can get a title, it's not complete,
         # but searching in other places doesn't work for all videos
-        re_title = r'<title>(?P<title>.*?)</title>'
-        title = unescapeHTML(re.search(re_title, webpage, re.DOTALL).group('title'))
+        video_title = self._html_search_regex(r'<title>(?P<title>.*?)</title>',
+            webpage, u'title', flags=re.DOTALL)
 
         return [{'id': video_id,
                  'url': video_url,
-                 'title': title,
-                 'thumbnail': thumb,
+                 'title': video_title,
+                 'thumbnail': video_thumbnail,
                  'ext': ext
                  }]
 
@@ -4195,7 +2567,7 @@ class BandcampIE(InfoExtractor):
         # We get the link to the free download page
         m_download = re.search(r'freeDownloadPage: "(.*?)"', webpage)
         if m_download is None:
-            raise ExtractorError(u'No free songs founded')
+            raise ExtractorError(u'No free songs found')
 
         download_link = m_download.group(1)
         id = re.search(r'var TralbumData = {(.*?)id: (?P<id>\d*?)$', 
@@ -4223,10 +2595,10 @@ class BandcampIE(InfoExtractor):
 
         track_info = {'id':id,
                       'title' : info[u'title'],
-                      'ext' : 'mp3',
-                      'url' : final_url,
+                      'ext' :   'mp3',
+                      'url' :   final_url,
                       'thumbnail' : info[u'thumb_url'],
-                      'uploader' : info[u'artist']
+                      'uploader' :  info[u'artist']
                       }
 
         return [track_info]
@@ -4243,17 +2615,14 @@ class RedTubeIE(InfoExtractor):
         video_id = mobj.group('id')
         video_extension = 'mp4'        
         webpage = self._download_webpage(url, video_id)
+
         self.report_extraction(video_id)
-        mobj = re.search(r'<source src="'+'(.+)'+'" type="video/mp4">',webpage)
 
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract media URL')
+        video_url = self._html_search_regex(r'<source src="(.+?)" type="video/mp4">',
+            webpage, u'video URL')
 
-        video_url = mobj.group(1)
-        mobj = re.search('<h1 class="videoTitle slidePanelMovable">(.+)</h1>',webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1)
+        video_title = self._html_search_regex('<h1 class="videoTitle slidePanelMovable">(.+?)</h1>',
+            webpage, u'title')
 
         return [{
             'id':       video_id,
@@ -4274,15 +2643,13 @@ class InaIE(InfoExtractor):
         video_extension = 'mp4'
         webpage = self._download_webpage(mrss_url, video_id)
 
-        mobj = re.search(r'<media:player url="(?P<mp4url>http://mp4.ina.fr/[^"]+\.mp4)', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract media URL')
-        video_url = mobj.group(1)
+        self.report_extraction(video_id)
 
-        mobj = re.search(r'<title><!\[CDATA\[(?P<titre>.*?)]]></title>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1)
+        video_url = self._html_search_regex(r'<media:player url="(?P<mp4url>http://mp4.ina.fr/[^"]+\.mp4)',
+            webpage, u'video URL')
+
+        video_title = self._search_regex(r'<title><!\[CDATA\[(?P<titre>.*?)]]></title>',
+            webpage, u'title')
 
         return [{
             'id':       video_id,
@@ -4304,27 +2671,17 @@ class HowcastIE(InfoExtractor):
 
         self.report_extraction(video_id)
 
-        mobj = re.search(r'\'?file\'?: "(http://mobile-media\.howcast\.com/[0-9]+\.mp4)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video URL')
-        video_url = mobj.group(1)
+        video_url = self._search_regex(r'\'?file\'?: "(http://mobile-media\.howcast\.com/[0-9]+\.mp4)',
+            webpage, u'video URL')
 
-        mobj = re.search(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') property=\'og:title\'', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1) or mobj.group(2)
+        video_title = self._html_search_regex(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') property=\'og:title\'',
+            webpage, u'title')
 
-        mobj = re.search(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') name=\'description\'', webpage)
-        if mobj is None:
-            self._downloader.report_warning(u'unable to extract description')
-            video_description = None
-        else:
-            video_description = mobj.group(1) or mobj.group(2)
+        video_description = self._html_search_regex(r'<meta content=(?:"([^"]+)"|\'([^\']+)\') name=\'description\'',
+            webpage, u'description', fatal=False)
 
-        mobj = re.search(r'<meta content=\'(.+?)\' property=\'og:image\'', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract thumbnail')
-        thumbnail = mobj.group(1)
+        thumbnail = self._html_search_regex(r'<meta content=\'(.+?)\' property=\'og:image\'',
+            webpage, u'thumbnail', fatal=False)
 
         return [{
             'id':       video_id,
@@ -4340,7 +2697,6 @@ class VineIE(InfoExtractor):
     _VALID_URL = r'(?:https?://)?(?:www\.)?vine\.co/v/(?P<id>\w+)'
 
     def _real_extract(self, url):
-
         mobj = re.match(self._VALID_URL, url)
 
         video_id = mobj.group('id')
@@ -4349,25 +2705,17 @@ class VineIE(InfoExtractor):
 
         self.report_extraction(video_id)
 
-        mobj = re.search(r'<meta property="twitter:player:stream" content="(.+?)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video URL')
-        video_url = mobj.group(1)
+        video_url = self._html_search_regex(r'<meta property="twitter:player:stream" content="(.+?)"',
+            webpage, u'video URL')
 
-        mobj = re.search(r'<meta property="og:title" content="(.+?)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1)
+        video_title = self._html_search_regex(r'<meta property="og:title" content="(.+?)"',
+            webpage, u'title')
 
-        mobj = re.search(r'<meta property="og:image" content="(.+?)(\?.*?)?"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract thumbnail')
-        thumbnail = mobj.group(1)
+        thumbnail = self._html_search_regex(r'<meta property="og:image" content="(.+?)(\?.*?)?"',
+            webpage, u'thumbnail', fatal=False)
 
-        mobj = re.search(r'<div class="user">.*?<h2>(.+?)</h2>', webpage, re.DOTALL)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract uploader')
-        uploader = mobj.group(1)
+        uploader = self._html_search_regex(r'<div class="user">.*?<h2>(.+?)</h2>',
+            webpage, u'uploader', fatal=False, flags=re.DOTALL)
 
         return [{
             'id':        video_id,
@@ -4390,18 +2738,13 @@ class FlickrIE(InfoExtractor):
         webpage_url = 'http://www.flickr.com/photos/' + video_uploader_id + '/' + video_id
         webpage = self._download_webpage(webpage_url, video_id)
 
-        mobj = re.search(r"photo_secret: '(\w+)'", webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video secret')
-        secret = mobj.group(1)
+        secret = self._search_regex(r"photo_secret: '(\w+)'", webpage, u'secret')
 
         first_url = 'https://secure.flickr.com/apps/video/video_mtl_xml.gne?v=x&photo_id=' + video_id + '&secret=' + secret + '&bitrate=700&target=_self'
         first_xml = self._download_webpage(first_url, video_id, 'Downloading first data webpage')
 
-        mobj = re.search(r'<Item id="id">(\d+-\d+)</Item>', first_xml)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract node_id')
-        node_id = mobj.group(1)
+        node_id = self._html_search_regex(r'<Item id="id">(\d+-\d+)</Item>',
+            first_xml, u'node_id')
 
         second_url = 'https://secure.flickr.com/video_playlist.gne?node_id=' + node_id + '&tech=flash&mode=playlist&bitrate=700&secret=' + secret + '&rd=video.yahoo.com&noad=1'
         second_xml = self._download_webpage(second_url, video_id, 'Downloading second data webpage')
@@ -4413,22 +2756,14 @@ class FlickrIE(InfoExtractor):
             raise ExtractorError(u'Unable to extract video url')
         video_url = mobj.group(1) + unescapeHTML(mobj.group(2))
 
-        mobj = re.search(r'<meta property="og:title" content=(?:"([^"]+)"|\'([^\']+)\')', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1) or mobj.group(2)
+        video_title = self._html_search_regex(r'<meta property="og:title" content=(?:"([^"]+)"|\'([^\']+)\')',
+            webpage, u'video title')
 
-        mobj = re.search(r'<meta property="og:description" content=(?:"([^"]+)"|\'([^\']+)\')', webpage)
-        if mobj is None:
-            self._downloader.report_warning(u'unable to extract description')
-            video_description = None
-        else:
-            video_description = mobj.group(1) or mobj.group(2)
+        video_description = self._html_search_regex(r'<meta property="og:description" content=(?:"([^"]+)"|\'([^\']+)\')',
+            webpage, u'description', fatal=False)
 
-        mobj = re.search(r'<meta property="og:image" content=(?:"([^"]+)"|\'([^\']+)\')', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract thumbnail')
-        thumbnail = mobj.group(1) or mobj.group(2)
+        thumbnail = self._html_search_regex(r'<meta property="og:image" content=(?:"([^"]+)"|\'([^\']+)\')',
+            webpage, u'thumbnail', fatal=False)
 
         return [{
             'id':          video_id,
@@ -4450,32 +2785,25 @@ class TeamcocoIE(InfoExtractor):
         url_title = mobj.group('url_title')
         webpage = self._download_webpage(url, url_title)
 
-        mobj = re.search(r'<article class="video" data-id="(\d+?)"', webpage)
-        video_id = mobj.group(1)
+        video_id = self._html_search_regex(r'<article class="video" data-id="(\d+?)"',
+            webpage, u'video id')
 
         self.report_extraction(video_id)
 
-        mobj = re.search(r'<meta property="og:title" content="(.+?)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = mobj.group(1)
+        video_title = self._html_search_regex(r'<meta property="og:title" content="(.+?)"',
+            webpage, u'title')
 
-        mobj = re.search(r'<meta property="og:image" content="(.+?)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract thumbnail')
-        thumbnail = mobj.group(1)
+        thumbnail = self._html_search_regex(r'<meta property="og:image" content="(.+?)"',
+            webpage, u'thumbnail', fatal=False)
 
-        mobj = re.search(r'<meta property="og:description" content="(.*?)"', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract description')
-        description = mobj.group(1)
+        video_description = self._html_search_regex(r'<meta property="og:description" content="(.*?)"',
+            webpage, u'description', fatal=False)
 
         data_url = 'http://teamcoco.com/cvp/2.0/%s.xml' % video_id
         data = self._download_webpage(data_url, video_id, 'Downloading data webpage')
-        mobj = re.search(r'<file type="high".*?>(.*?)</file>', data)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract video url')
-        video_url = mobj.group(1)
+
+        video_url = self._html_search_regex(r'<file type="high".*?>(.*?)</file>',
+            data, u'video URL')
 
         return [{
             'id':          video_id,
@@ -4483,9 +2811,9 @@ class TeamcocoIE(InfoExtractor):
             'ext':         'mp4',
             'title':       video_title,
             'thumbnail':   thumbnail,
-            'description': description,
+            'description': video_description,
         }]
-        
+
 class XHamsterIE(InfoExtractor):
     """Information Extractor for xHamster"""
     _VALID_URL = r'(?:http://)?(?:www.)?xhamster\.com/movies/(?P<id>[0-9]+)/.*\.html'
@@ -4494,8 +2822,9 @@ class XHamsterIE(InfoExtractor):
         mobj = re.match(self._VALID_URL, url)
 
         video_id = mobj.group('id')
-        mrss_url='http://xhamster.com/movies/%s/.html' % video_id
+        mrss_url = 'http://xhamster.com/movies/%s/.html' % video_id
         webpage = self._download_webpage(mrss_url, video_id)
+
         mobj = re.search(r'\'srv\': \'(?P<server>[^\']*)\',\s*\'file\': \'(?P<file>[^\']+)\',', webpage)
         if mobj is None:
             raise ExtractorError(u'Unable to extract media URL')
@@ -4505,39 +2834,33 @@ class XHamsterIE(InfoExtractor):
             video_url = mobj.group('server')+'/key='+mobj.group('file')
         video_extension = video_url.split('.')[-1]
 
-        mobj = re.search(r'<title>(?P<title>.+?) - xHamster\.com</title>', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract title')
-        video_title = unescapeHTML(mobj.group('title'))
+        video_title = self._html_search_regex(r'<title>(?P<title>.+?) - xHamster\.com</title>',
+            webpage, u'title')
 
-        mobj = re.search(r'<span>Description: </span>(?P<description>[^<]+)', webpage)
-        if mobj is None:
-            video_description = u''
-        else:
-            video_description = unescapeHTML(mobj.group('description'))
+        # Can't see the description anywhere in the UI
+        # video_description = self._html_search_regex(r'<span>Description: </span>(?P<description>[^<]+)',
+        #     webpage, u'description', fatal=False)
+        # if video_description: video_description = unescapeHTML(video_description)
 
         mobj = re.search(r'hint=\'(?P<upload_date_Y>[0-9]{4})-(?P<upload_date_m>[0-9]{2})-(?P<upload_date_d>[0-9]{2}) [0-9]{2}:[0-9]{2}:[0-9]{2} [A-Z]{3,4}\'', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract upload date')
-        video_upload_date = mobj.group('upload_date_Y')+mobj.group('upload_date_m')+mobj.group('upload_date_d')
-
-        mobj = re.search(r'<a href=\'/user/[^>]+>(?P<uploader_id>[^>]+)', webpage)
-        if mobj is None:
-            video_uploader_id = u'anonymous'
+        if mobj:
+            video_upload_date = mobj.group('upload_date_Y')+mobj.group('upload_date_m')+mobj.group('upload_date_d')
         else:
-            video_uploader_id = mobj.group('uploader_id')
+            video_upload_date = None
+            self._downloader.report_warning(u'Unable to extract upload date')
 
-        mobj = re.search(r'\'image\':\'(?P<thumbnail>[^\']+)\'', webpage)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extract thumbnail URL')
-        video_thumbnail = mobj.group('thumbnail')
+        video_uploader_id = self._html_search_regex(r'<a href=\'/user/[^>]+>(?P<uploader_id>[^<]+)',
+            webpage, u'uploader id', default=u'anonymous')
+
+        video_thumbnail = self._search_regex(r'\'image\':\'(?P<thumbnail>[^\']+)\'',
+            webpage, u'thumbnail', fatal=False)
 
         return [{
             'id':       video_id,
             'url':      video_url,
             'ext':      video_extension,
             'title':    video_title,
-            'description': video_description,
+            'description': video_description,
             'upload_date': video_upload_date,
             'uploader_id': video_uploader_id,
             'thumbnail': video_thumbnail
@@ -4561,10 +2884,9 @@ class HypemIE(InfoExtractor):
         cookie = urlh.headers.get('Set-Cookie', '')
 
         self.report_extraction(track_id)
-        mobj = re.search(r'<script type="application/json" id="displayList-data">(.*?)</script>', response, flags=re.MULTILINE|re.DOTALL)
-        if mobj is None:
-            raise ExtractorError(u'Unable to extrack tracks')
-        html_tracks = mobj.group(1).strip()
+
+        html_tracks = self._html_search_regex(r'<script type="application/json" id="displayList-data">(.*?)</script>',
+            response, u'tracks', flags=re.MULTILINE|re.DOTALL).strip()
         try:
             track_list = json.loads(html_tracks)
             track = track_list[u'tracks'][0]
@@ -4605,11 +2927,12 @@ class Vbox7IE(InfoExtractor):
         video_id = mobj.group(1)
 
         redirect_page, urlh = self._download_webpage_handle(url, video_id)
-        redirect_url = urlh.geturl() + re.search(r'window\.location = \'(.*)\';', redirect_page).group(1)
+        new_location = self._search_regex(r'window\.location = \'(.*)\';', redirect_page, u'redirect location')
+        redirect_url = urlh.geturl() + new_location
         webpage = self._download_webpage(redirect_url, video_id, u'Downloading redirect page')
 
-        title = re.search(r'<title>(.*)</title>', webpage)
-        title = (title.group(1)).split('/')[0].strip()
+        title = self._html_search_regex(r'<title>(.*)</title>',
+            webpage, u'title').split('/')[0].strip()
 
         ext = "flv"
         info_url = "http://vbox7.com/play/magare.do"
@@ -4643,10 +2966,7 @@ class GametrailersIE(InfoExtractor):
             mgid_re = r'data-video="(?P<mgid>mgid:.*?)"'
         else:
             mgid_re = r'data-contentId=\'(?P<mgid>mgid:.*?)\''
-        m_mgid = re.search(mgid_re, webpage)
-        if m_mgid is None:
-            raise ExtractorError(u'Unable to extract mgid')
-        mgid = m_mgid.group(1)
+        mgid = self._search_regex(mgid_re, webpage, u'mgid')
         data = compat_urllib_parse.urlencode({'uri': mgid, 'acceptMethods': 'fms'})
 
         info_page = self._download_webpage('http://www.gametrailers.com/feeds/mrss?' + data,
@@ -4668,11 +2988,11 @@ class GametrailersIE(InfoExtractor):
         video_description = m_info.group('description')
         video_thumb = m_info.group('thumb')
 
-        m_urls = re.finditer(r'<src>(?P<url>.*)</src>', links_webpage)
-        if m_urls is None:
+        m_urls = list(re.finditer(r'<src>(?P<url>.*)</src>', links_webpage))
+        if m_urls is None or len(m_urls) == 0:
             raise ExtractError(u'Unable to extrat video url')
         # They are sorted from worst to best quality
-        video_url = list(m_urls)[-1].group('url')
+        video_url = m_urls[-1].group('url')
 
         return {'url':         video_url,
                 'id':          video_id,
@@ -4749,6 +3069,7 @@ def gen_extractors():
         HypemIE(),
         Vbox7IE(),
         GametrailersIE(),
+        StatigramIE(),
         GenericIE()
     ]