http://www.rc-cam.com/ is a good introduction to video systems. Also check the message board, I think there was just someone asking about a video camera for a small plane.

You will want something really light because that plane won't be able to carry very much. I can't find what size motor it has or how much it weighs but I'd guess it won't carry more than ~ 4 oz. You could experiment with putting lead weights on it to see how much it'll lift. Just don't put too much on at once and be careful not to change the CG.