The fact is, they are watching, and a surprising number are succeeding. I don't think this is a great solution, but you cannot deny the fact that there are a lot of people out there benefiting from this delivery method that would not otherwise be here at all. My wife is a terrific example. Her husband has a demanding job with a difficult schedule, and she is a full-time mom with a degree. The instructors fell completely into the 'world as our lecture hall' trap.
Interaction is at a bare minimum, and the tapes are mind-numbing.
If we start with the assumption that video is not great but better than nothing, we can at least make very good video better than a bad lecture hall experience. Take it in a class, take it on line, take it over video. OK, he has the funding and resources to make real science education fun and relevant to kids. His market is not the same, and in fact our students could be turned off by 'too glitzy' a production. My heroes when I was totally unserved by public education were Carl Sagan, Jaques Cousteau, and Isaac Asimov.