Is a video format similar to MP4. The difference between the formats is their developers and protection. Apple company, has developed a format that has provided DRM-lock for M4V. Video files in this format are downloaded from iTunes.
Is a container for storing DVD-Video. The basis of the format is MPEG-2 leg, and therefore it may contain multiple streams. It is possible to add a maximum of 9 audiois a streams and 32 kinds of subtitles. Video added solely with MPEG-2 codec.