“The extensions mpa and mpv are just to be more explicit of what they contain. mp4 is the generic.” Reddit · r/handbrake · 6 years ago
If the file is unprotected, it can often be renamed to .mp4 and played on most standard media players without any quality loss. RockBlackDoll.m4v
Users often find the M4V format confusing due to its similarity to MP4 but restrictive nature on non-Apple devices. “The extensions mpa and mpv are just to