![]() ![]() Generally speaking, iTunes videos are in M4V format especially DRM-protected M4V format which can be played on Apple devices. And you can only play protected M4V files on authorized computers and Apple devices, such as Apple iTunes, QuickTime Player, etc. So if you want to play a protected M4V file, your computer needs to be authorized (using iTunes) with the account that was used to purchase the video. The differences are the optional Apple’s DRM copyright protection, and the treatment of AC3 (Dolby Digital) audio which is not standardized for MP4 container.Apple uses M4V files to encode TV episodes, movies, and music videos in the iTunes Store. The M4V file format is a video file format developed by Apple and is very close to MP4 format. M4V is a file container format used by Apple’s iTunes application.
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