Can't read photo booth video file

I accidentally closed photobooth while it was in the middle of recording a video..The video doesn't display as a little thumbnail in photobooth, but I can find it in the folder in my finder. However, when i try to open it, QT and VLC say it's not a movie? It's 300 mb, so I know it has to have some sort of information on it. Is there anyway to get it back?? Thanks so much for your help!!