3dmark06. 3dmark Vantage is more up to date, but costs about $7 for the basic addition. Oh wait, you probably want something for video movies and such. forget my info then :P
Depending on what exactly you meant by video benchmarks, you probably can find what you need here: http://www.benchmarkhq.ru/english.html?/b_e.html
About every benchmark there is will be found there.