I haven't seen the movie either, but what was the point exactly of that YouTube video? Was it just to show how terribly of an actor Cage is in the movie? Or was it something to do with the woman-beating? Sorry, maybe my brain isn't clicking today..
I will say that I watched "Next" on a plane in the summer and his acting was god-awful.
He's decent in Adaptation, though.
EDIT: Never watched "Leaving Las Vegas" though.