I wouldn't go an AVI, personally. It will require way too much bandwidth, and who cares about what Admin can handle (;)), its what the individual user can handle. If i were on 56k or even 256k i'd seriously have doubts about downloading 40MB of video tutorial. It also requires the right codecs.
I like the HTML one much better anyway. Its simple and easy to watch. No messing around with codecs and programs, etc.
Also, about the copyright issues. Who cares? Seriously. Its a tutorial. You have to be a member here and have X-Unleashed to make any use of it. The more these tutorials get passed around, the better in my opinion.
EDIT: 1000 posts, yay! \o/
