Try this program:
Video Repair Tool 1.6.1
https://www.softpedia.com/get/Multimedia/Video/Other-VIDEO-Tools/Video-Repair-Tool.shtml
You download the free demo, check that it can save your clip, and then pay 99 Euros for a fully licensed version to save all the clips you wish or 40Euro for 5 clip saves. It worked for me and is a darn site cheaper than a $100US per clip program.
For some reason it doesn’t work on clips bigger than 2 gigs right now, but they are working on it.