I think you mean, as long as it explains why, what and how in the shortest possible number of words it’s a good video. Spending time trying to be funny or not actually explaining would be bad, if it takes a while to explain more thought and structure may be needed.
Sorry, I didn't mean to come across that way. I understand how you would like it, but personally I'm happy to play a video with sounds if it explains things quickly and clearly.
I didn't take it as a negative. I just wanted to clarify. I'm fierce on this topic as I can sense video becoming more pervasive and I think it's usually the wrong choice - as well as personally hating it most of the time.
I watch plenty of YouTube videos but that's when I'm in a different mode. For understanding stuff I want to skim read short clear text with illustrations. Animation and video can enhance that but it shouldn't replace it.