Fact is, Khan's videos are considered good because the actual history education that most students take away from classrooms is even worse. Like most other subjects, that's what you get when you try to deliver a comprehensive, objective, detail-oriented education to students who (within a small margin of error) couldn't give a shit. Never mind the Bolsheviks or the timeline -- what percentage of randomly sampled American high school graduates would even know that there was a Russian Revolution if you asked them?
If we can replace zero history with a fifteen-minute-chunk version of history, I'm for it.