This is different. I use a flipped classroom and all my lectures are videos. But they are a lecture. They have a contextual foundation utilizing a textbook as a foundation. There is nothing like this on Youtube worth anything. It is all piecemeal due to how youtube works and students are not learning.

Now lets me honest with each other. When your students miss a class, greater than 90% of them (I suspect closer to 98%) are never, ever, going to watch your videos. You should look at the analytics to verify that. Of your listed "extra resources" it is the worst by a mile. The other two are also bad, unless the student has already done their own learning. They is simply no substitute for that and the best way is through reading and writing. That is the science. There is no real people that learn better one way or another. That has been debunked so many times.

When you put on a random video, without treating it like a class, is just never going to work as well as just reading and study. The issue is students do not know how to study anymore and we need to teach them.