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.
DivX is a brand of video codec products developed by DivX, LLC. The DivX codec is notable for its ability to compress lengthy video segments into small sizes while maintaining relatively high visual quality. There are three DivX codecs; the original MPEG-4 Part 2 DivX codec, the H.264/MPEG-4 AVC DivX Plus HD codec and the High Efficiency Video Coding DivX HEVC Ultra HD codec.