png = self._download_webpage(png_url, video_id, 'Downloading url information')
m3u8_url = _decrypt_url(png)
formats = self._extract_m3u8_formats(m3u8_url, video_id, ext='mp4')
png = self._download_webpage(png_url, video_id, 'Downloading url information')
m3u8_url = _decrypt_url(png)
formats = self._extract_m3u8_formats(m3u8_url, video_id, ext='mp4')