secret = self._search_regex(r'secret"\s*:\s*"(\w+)"', webpage, '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'
secret = self._search_regex(r'secret"\s*:\s*"(\w+)"', webpage, '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'