01a.m4v < Android ULTIMATE >

: A command-line tool for advanced users. A standard command to copy the streams into an MP4 container is: ffmpeg -i 01A.m4v -c copy output.mp4 . What Are M4V Files? | M4V Format Explained - Adobe

: A free, open-source tool widely used for converting M4V to more universal formats like MP4/H.264. 01A.m4v

: The VLC Media Player is highly recommended for opening M4V files on Windows, Mac, and mobile devices. : A command-line tool for advanced users

If 01A.m4v won't play on non-Apple devices (like Android phones) or if you need to upload it to platforms like YouTube, you should convert it to : 01A.m4v

: If the file is unprotected (no DRM), you can often simply change the file extension from .m4v to .mp4 manually.