Question for NBA fans who make mixes?

Well im planning on making a NBA mix of some of my favorite players ,but i don't know where i can get the clips for free to download. So does anyone know where i can download free clips to make NBA mixes. I've seen Osiris's Carmelo Anthony Written in the star mix and The huge GSW fan's Monta Ellis run this town tonight. So if Osiris and the GSW can tell me how they do it, it would be spectacular.