Even the newer Canon 50D doesn't have video and you'd have to look at the Nikon D90 for video in that class of camera. Before jumping into DSLR video and thinking it'll be a great choice for youtube videos, you should read this article talking about the great aspects of DSLR video and the very real problems for using it as a camcorder replacement.
I want a new camera. I've looked at the Canon 20D and Nikon D50&D70, they look wonderful and great, but the one thing I noticed about them is that I didn't see a lil video button. I take a lot of photos and videos of random things, and I want to video things so I can show others and put it in YouTube. I needs help.