File Extension M4V

File type: MPEG-4 video file or iTunes Video File

About the M4V file type:

If Windows cannot find the appropriate program associated with .M4V files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The M4V file is a multimedia container file format primarily used by Apple for videos downloaded from their iTunes store. The M4V file is essentially the same as an MP4 file, except that the M4V file includes Apples proprietary copyright management software.

Additional Information:
For Windows and Mac OS specific software/hardware that can open M4V files include Apple iTunes, Quick Time Player or an iPod.