How to get a video (worst bands) to put on a movie?

ok i making a movie thing (10 top worst bands in my opinion) and am gona post it on youtube...well where do i get music videos of these bands that i can donwload to put on my movie thing??? if it helps the bands are The Rocket Summer, maroon 5, 30 seconds to mars, system of a down, korn, POD, family force 5, fall out boy, good charlotte, and funeral for a friend...