I also find a common theme in vintage training videos: They don't assume the audience is an idiot. I find that the more dumbed-down the information is, the les

I also find a common theme in vintage training videos: They don't assume the audience is an idiot. I find that the more dumbed-down the information is, the less trust they placed in the audience, the more they felt complled to entertain rather than inform the audience, the worse the result is typically. I find this to be true and very relevant in modern education. You don't need to gamify mathematics. You need to clearly communicate just how awesome and interesting mathematics itself is.