We pretty much killed Heroic Lich King on 10 man. Pretty much. 
I've increased the speed by 50% to make it easier to watch, and as such I don't have any audio on it. I might make another with the vent, but for now you can just play your own music over it -_-
Also, the 720p version is is here. You need that version to read any of the text (and see precisely how bad I am at wow).