if not json_url:
iframe_url = self._html_search_regex(
r'<iframe[^>]+src=(["\'])(?P<url>.+\bjson_url=.+?)\1',
- webpage, 'iframe url', group='iframe url')
+ webpage, 'iframe url', group='url')
json_url = compat_parse_qs(
compat_urllib_parse_urlparse(iframe_url).query)['json_url'][0]
return self._extract_from_json_url(json_url, video_id, lang)