I'm sensing after watching both this and the Brutal Legend video they've got something in common.
They've found something we all love (most of us, then),but has admittedly been done many times before, and while not being hugely original, managed to distill it down to such a pure form, and present it so stylishly, that you can't help but love it, I'll be on the phone asking my friend if she's up for a couple of hours zombie murder at the weekend now. If not, maybe we'll go see this movie.