Wait ... what? Did you even watch the whole video?
First of all, he says all kinds of positive things about the work you're doing. "Impugn Khan Academy"? Really?
Second, he is explaining physics education research that he himself did for his Ph.D thesis. He's using examples from his own work to make comparisons in technique to what worked and what didn't work in his own, actually objectively tested research. This is not "a small interview of a handful of people".
Third, he's not saying videos can't explain things - he's saying that they often fail to make students question their own pre-existing misconceptions.
I hope you actually watch the whole video and catch the research context? I mean I am handing you a research-tested science education technique that you could easily incorporate into your own videos if you actually wanted.