It could be that students don't in fact place the same value in those things. However, in my humble experience, the Khan videos are actually much better at pro

It could be that students don't in fact place the same value in those things. However, in my humble experience, the Khan videos are actually much better at providing those things than most of the lecturers I have ever had. Sure he doesn't go off on tangents about work he did as a grad student in some tenuously related topic two decades ago, but I consider that a win and unrelated to "Depth, insight, introspective"