The VLC Media Player is a highly recommended free, open-source tool that plays almost any M4V file regardless of your operating system. Managing and Converting the File
If this is a personal recording from a smartphone or camera, it likely does not have DRM protection and can be opened with most modern media players: Use QuickTime Player or the Apple TV app. Vid 20220426 015056 485 m4v
For many non-DRM M4V files, you can simply right-click the file and manually change the extension from .m4v to .mp4 . This often makes it instantly compatible with more devices. The VLC Media Player is a highly recommended
Windows Media Player or Media Player Classic typically support M4V. Vid 20220426 015056 485 m4v