If your device doesn't support M4V, you can convert it to the more universal format: What Are M4V Files? | M4V Format Explained - Adobe
If you are downloading a non-protected M4V from a website, most modern browsers will play the video in a tab rather than downloading it. To force a download, right-click the video link and select "Save Link As..." . Opening M4V Files Download final m4v
These files generally must be played within Apple’s authorized apps. Attempting to open them in third-party players like VLC will usually result in an error unless the DRM is removed. Converting M4V for Better Compatibility If your device doesn't support M4V, you can