Why are my y0utube videos black?

Hey what`s the matter with y0utube? I upload a video (which plays on my computer) but when I play it from y0utube,it`s black, I can only hear the music. What`s up with that? Anyone experienced something similar to this?

Can`t edit my post but never mind. The problem was with the format.When I saved the movie as wmw it worked.Anyway if you guys want a free nice and easy to use alternative to the mofo crashing moviemaker,try pinnacle video spin. Drag and drop, what else could you want?