To celebrate Halloween holiday 2020, the professional multimedia software TunesKit is now running a giveaway for its Video Repair software ( originally valued at $39.95 and now $0).
Features of TunesKit Video Repair:
1. Fix various video corruption issues including choppy or jerky video, video not playing on the computer, audio out of sync, black screen, etc.
2. Support up to 25+ video and audio file formats such as MP4, MOV, AVI, MP3, etc.
3. Repair the corruption of video files in 3 simple steps.
Note: the giveaway version can be used for one year, with no free upgrade supported.
Looks a bit dodgy.. I wouldn't trust it.