CleverFiles WORKS
CleverFiles WORKS! Tried VLC and HandBrake, got nowhere. Uploaded the 4GB file that had been corrupted (I think power drop at some point in the recording) along with a smaller file that was uncorrupted, had my corrupted file FIXED flawlessly in about 5 minutes. Instructions were clear, super simple, and it saved me a good 3 or 4 hours of tricks and foolishness to edit a video with the last 5 minutes missing.