The key difference between the two files however is from a security perspective as an M4V file can only be played by a computer if it has been authorised to do so.
Both the size of an MP4 and M4V and the quality of an MP4 and M4V are, generally speaking, the same. All video content, including television shows and films are downloaded in the M4V format which is similar to the popular MP4 file format. The M4V file was developed by Apple and is as an MPEG-4 file that contains video data which has been downloaded from Apples’ iTunes.
An M4V file is more commonly known as an iTunes Video file.
