This is an attempt at constructive criticism, so please take it that way. If I'm way off base, please, community at large, flame away. But I think the audience on this web site can be heard saying, "Shut the hell up and run Visual Studio already!!!" during these types of videos.
I'm very interested in the 2010 product, but in spite of that, the first two videos have both put me right to sleep. Too much "high level overview" stuff. Specifically, too much talking about what you had in the PPT slides. You could have just put the slides up and paused for about 5-10 seconds to let me read them. Your talking about them provided literally zero additional information than my reading would have given me.
I found myself clicking every 1/4 inch on the timeline looking for something other than bullet points with your head in the corner (which covered up text on several slides, btw). When you finally got to the XAML start page stuff, that was relatively interesting. I did stop long enough to look at the bullet points when the slides changed, but other than that, it was SKIP AHEAD time.
...but maybe it's just that my attention span is that of an ADHD 10-year old.