I found this video via a tweet from Karen Mahoney. As a long-time fan of "Buffy, the Vampire Slayer" and "Angel," this video just rocked my socks off! I had to put it here for posterity.
If you haven't seen these shows yet, maybe this will convince you!
Edit: Blogger seems to be cutting off the side of the vid, so here's the link to the YouTube page where you can probably see it better.