“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 you're having trouble playing this specific file, you can try opening it with the VLC media player or using a tool like HandBrake to convert it to a more universal format. What Are M4V Files? | M4V Format Explained - Adobe 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
These files are designed for seamless playback on Apple products like iPhone, iPad, and Apple TV. | M4V Format Explained - Adobe Users often
If the file is unprotected, it can often be renamed to .mp4 and played on most standard media players without any quality loss.