- mobj = re.match(self._VALID_URL, url)
- author = mobj.group('author')
- name = mobj.group('name')
- clip_id = mobj.group('clip')
- course = mobj.group('course')
+ qs = compat_urlparse.parse_qs(compat_urlparse.urlparse(url).query)
+
+ author = qs.get('author', [None])[0]
+ name = qs.get('name', [None])[0]
+ clip_id = qs.get('clip', [None])[0]
+ course = qs.get('course', [None])[0]
+
+ if any(not f for f in (author, name, clip_id, course,)):
+ raise ExtractorError('Invalid URL', expected=True)