Some (but not much) background information on the new video site
here I think this is more about consolidating internal videos. At the moment it's all over the place. C8/9/10 and then there are things like MIX University, WPF Boot Camp, Firestarter, Webcasts etc etc.
It all gets very confusing very quickly. Especially when you can remember seeing something good but can't remember where you saw it!
At MIX08 I got the sense that there is a lot of internal competition within Microsoft for video (I may be over-reacting to a comment or two from different Microsofties), plus of course you have individual bloggers doing their own screencasts on their blogs, on top of stuff like dotnetvideos.net and the official "How do I" asp.net screencasts - just trying to keep track of all the URLS for these "learning resource videos" is horrific.