+ @staticmethod
+ def _extract_urls(webpage):
+ return [
+ mobj.group('url')
+ for mobj in re.finditer(
+ r'<iframe\b[^>]+\bsrc=(["\'])(?P<url>(?:https?:)?//(?:%s)/embed-[0-9a-zA-Z]+.*?)\1'
+ % '|'.join(site for site in list(zip(*XFileShareIE._SITES))[0]),
+ webpage)]
+