Bad advice. Even if the footage was good enough to prove it was him, there's no such thing as a 100% win in court. All it takes is to get the wrong person on the wrong day after the night before and you can lose. The camera footage would have to be excellent (as in broadcast quality) to get a win IMHO, I've seen it happen too many times before. The CCTV should act as a deterrent, not as your proof to take him to court.
If he scratches it at night, wears a coat, the sun is in the wrong direction etc then that footage will be useless.