Depending on whether the file is copy-protected, you have several options for viewing it: [Updated] What is M4V File Format & How to Play M4V Video
The M4V format is closely related to the more common MP4 format but is specifically optimized for the Apple ecosystem. 4501731.m4v
Primarily used for movies, TV episodes, and music videos purchased or rented from the iTunes Store . Depending on whether the file is copy-protected, you