With Filestar you get 258 different skills for working productively with iTunes Video (.m4v) files.
About .M4v
Name
iTunes Video
Extension
.m4v
Format
Binary
Category
Video
Developer
Apple
Description
The M4V file format is a video container format developed by Apple and is very similar to the MP4 format, with the primary difference being the optional Apple Digital Rights Management (DRM) protection. M4V files are commonly used for TV episodes, movies, and music videos in the iTunes Store. These files can be played on Apple devices such as iPhones, iPads, and iPods, as well as on PCs using iTunes or other compatible media players.