A damaged film reel footage, with original projector sound included, good as background graphics. Video is full of camera jitter and flicker, and wear, spots and scratches.
Also, you may just put it over your layer video, in AE, use Blending Style, like Multiply, and have the damage effect altering directly on your video.
Also, check my best AE project (usefull as video introduction) if you like http://videohive.net/item/film-projector-old-memories/4128455