: 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
: QuickTime Player and iTunes are the default choices for Apple devices. 01A.m4v