What is M4V (DRM & DRM-free)
The M4V is a file container format developed by Apple. Just as other container formats like AVI, WMV, MKV, M4V contains multiple streams including video and audio. It is widely used in TV episodes, movies and music that sells through the iTunes Store.
M4V files are similar to MP4 files, but the M4V files may optionally be protected by FairPlay DRM copy protection. Thus, most M4V videos can only be played in Apple devices like iPhone 7, iPhone 7 Plus, iPad 2, iPad mini, etc. However, as the format which is similar to MP4 files, unprotected M4V files could be play in MP4 players through previous M4V to MP4 conversion by using special software.