Some of our courses include pre-recorded screencast videos. I am teaching the CodeLesson PHP course right now and I use a few videos in my course. I don't know if Zed is planning on using any in his course but I don't think so. If we ever offer Introduction to Oil Painting we'll probably do a lot more videos for that course.
Philosophically, we are avoiding the notion of live video formats for a couple of reasons. First, there are products that exist to do live video today (Skype, etc.). But more importantly, the big benefit of an online course is that because the course has no set meeting time, students and instructors can time-shift (this is the same benefit of email versus talking on the phone). With live video, you lose that. That isn't to say that live interactions in our courses aren't an option (you're still free to pick up the phone), they just aren't a differentiator for us.
Because our courses are instructor-led, you're going to get answers to your questions, which is something that pre-recorded videos can't really provide.