The beauty of these video formats is that they can be converted from one format to another format. The output file size and quality of MP4 are much better compared to MOV. The MP4 container comprises Graphics, video, subtitles, and audio data. It is an upgraded version of the MOV file format that works with different media players and also supports mobile devices and USB drives. On the other hand, MP4 is also a container format developed by the International standard. MOV files usually store video files in high quality and size although they are slightly larger than MP4 files. It stores videos, audios, texts, 3D, virtual reality, graphics, and animations. MOV is a container format developed by Apple to be used on QuickTime player. Part 1: Reasons Behind the Inaccessibility or Corruption of Videos 05 How to Avoid Video Corruption on Mac?.04 How to Repair Video Files on Mac with VLC Media Player?.03 Can QuickTime Player Repair Corrupt MOV (MP4) Videos?.02 Why We Need Wondershare Repairit Video Repair Software for Mac?.01 Reasons behind the Inaccessibility or Corruption of Videos.