With Filestar you get 170 different skills for working productively with iTunes Video .(m4v) files.
About .M4v
Name
iTunes Video
Extension
.m4v
Format
Binary
Category
Video
Developer
Apple
Description
An M4V file is an MPEG-4 file used to store video downloaded from the Apple iTunes store, such as TV episodes, music videos, and full-length movies. It is similar to the .MP4 file, but may be copy-protected using Apple's FairPlay DRM copyright protection.