To repair corrupt MP4 video files, try using software like Recoveryfix Video Repair, or Kernel Video Reapir. These tools can fix broken codecs, damaged headers, and other issues affecting playback. It repair single or multiple corrupt/inaccessible video files of all format, including MP4, FLV, M4V, WEBM, 3GP, MOV, AVI, etc. Get info, visit to: https://www.recoveryfix.com/video-repair/