downloading a course from torrent, it has files split (into audio and video) and are encrypted. the files "play" separately but no audio or video. author hasn't replied neither on torrent site
How to Merge MP4 and M4A Files Together?
Megui 2876 .264 extensions ??? - VideoHelp Forum
Top 3 Tips to Combine MP4 and M4A Files [2021]
How to Merge MP4 and WebM Together | 4 Quick Ways
Top 3 Tips to Combine MP4 and M4A Files [2021]
StaxRip 2.0 Support Thread - Page 73 - Doom9's Forum