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 format of video coding from the Windows Media package. Video files in this format are encoded on technology Windows Media Video; about 15 codecs variants are available all up. It supports the streaming video display. Developed by Microsoft company.