For you guys that don't want to fork out the cash for a Go-Pro you might want to try one of these cheap $20 ebay "spy cams", the ones I bought look like cigarette lighters and take HD video, if it falls off and gets run over who cares? I used electrical tape to strap 2 of them on one of my high powered rockets and it worked fine.
[video=youtube;g6HW16YTcDc]http://www.youtube.com/watch?v=g6HW16YTcDc&feature=g-upl[/video]