+ @staticmethod
+ def _extract_url(webpage):
+ mobj = re.search(
+ r'<iframe[^>]+?src=(["\'])(?P<url>https://www\.facebook\.com/video/embed.+?)\1', webpage)
+ if mobj is not None:
+ return mobj.group('url')
+
+ # Facebook API embed
+ # see https://developers.facebook.com/docs/plugins/embedded-video-player
+ mobj = re.search(r'''(?x)<div[^>]+
+ class=(?P<q1>[\'"])[^\'"]*\bfb-(?:video|post)\b[^\'"]*(?P=q1)[^>]+
+ data-href=(?P<q2>[\'"])(?P<url>(?:https?:)?//(?:www\.)?facebook.com/.+?)(?P=q2)''', webpage)
+ if mobj is not None:
+ return mobj.group('url')
+