Hasta La Motion!

Hi, Im just curios if anyone knows about if there exists any database with filmed material, for free usage. I know there are lots of photo data bases on the net but it would be great if there was something similar with filmed material. Lets say you dont have a camera and want to learn tracking or mayby implement 3d cg. Would also be nice if that website/ database had info about what camera was used, film lens and so on. If anyone knows anything it about this it would be great to hear from you

/ Mega1977