fmts, subs = self._extract_m3u8_formats_and_subtitles(src['url'], video_id, ext='mp4')
formats.extend(fmts)
subtitles = self._merge_subtitles(subtitles, subs)
fmts, subs = self._extract_m3u8_formats_and_subtitles(src['url'], video_id, ext='mp4')
formats.extend(fmts)
subtitles = self._merge_subtitles(subtitles, subs)