I think that the crux of the argument seems to be this idea that there is a "magic bullet" to fix the education system. As a former teacher I can tell you that if there is a magic bullet it's parent involvement in students lives. No textbook, online video, or even a fantastic teacher is an acceptable substitute for parent involvement as a foundation for a child's educational success.

With that said, I think that KA is an excellent addition to the pieces of the educational puzzle. I've used many of his videos to supplement teaching and textbooks, both good and bad.