if video_id is None:
webpage = self._download_webpage(url, mobj.group('path'))
video_id = self._search_regex(r'videoId = "(\d+)";', webpage, u'video id')
info_url = self._VIDEO_INFO_TEMPLATE % video_id
if video_id is None:
webpage = self._download_webpage(url, mobj.group('path'))
video_id = self._search_regex(r'videoId = "(\d+)";', webpage, u'video id')
info_url = self._VIDEO_INFO_TEMPLATE % video_id