Need help repairing a .mov file from photobooth

Me and my GF were taking video with photobooth on the train and our stop came so I closed the macbook and I guess it never finalized, it's a 241 mb file that won't play. I used treasurer and it showed very well that a lot of the video was STILL in the file, can anyone give me tips on how to extract the piece I want? I've tried a few things...