Great observations, thanks!

Yes, the audio in this segment is really hollow because I was shooting with a shotgun in a small enclosed space. In the evolution of the "studio," I worked on lighting first and then audio (which gets better in later segments - more treatment of the space like you recomend and swithed to cheap lav). I'm STILL struggling with the audio.

And yes again: white is easier to key on simply because white fringes and imperfect keys are much more forgiving than trying to deal with green halos. Yes, I can do a perfect key in this setup, but it's a lot of work in post (like it ALWAYS is in any situation) and I just don't have the time or talent to do that and still finish a segment every other week.

Yea, there are differences, of course, but I think it's in degree and detail, and not content. "TechKnow" episodes also involved about 3x more manhours overall - there's definitely a professional polish that's missing in my homemade videos. On the other hand, the 720p video here on Vimeo looks better and loads faster than the Ultra quality vids at Digital Juice, so there's that.