formats.extend(self._extract_m3u8_formats(
hls_url, video_id, ext='mp4', m3u8_id='hls'))
self._remove_duplicate_formats(formats)
formats.extend(self._extract_m3u8_formats(
hls_url, video_id, ext='mp4', m3u8_id='hls'))
self._remove_duplicate_formats(formats)