The maximum is 10 minutes these days, and multipart videos are common. This is approximately the length of the individual videos in Coursera, eg Andrew Ng’s cou

The maximum is 10 minutes these days, and multipart videos are common. This is approximately the length of the individual videos in Coursera, eg Andrew Ng’s course on machine learning. I was in a computer science theory class at a prestigious university, and a number of otherwise extremely intelligent CS majors had a curious difficulty understanding the Pumping Lemma. They would ask the teacher to explain it. This happened a few times since attendance wasn’t mandatory and not everyone was present. The resulting explanation from the instructor would absolutely fit into a three minute TikTok, plus it would be rewatchable. Unfortunately, there’s no video there that explains it today, but that could be remedied.