I almost forgot to mention but last night on The Tonight Show they had a Harry Potter sketch. Not sure if you're interested in including it in your archives but you can watch it on the official Tonight Show website.
Here's a direct link to the video:
http://www.tonightshowwithconanobrien.com/video/clips/belligerent-dumbledore-120909/1183788/
If you're interested in including it let me know and I'll send you links for the full episode in 720p.
They've done a sketch with that guy playing Dumbledore before but I can't remember when. If you're interested in the one posted above I'll see if I can find when they did the other sketch.