While I generally agree with you, especially about the writing code part, you might be underestimating the importance this kind of visual fluff can have for some people to basically keep them awake and focussed. That old classic K&R book on C programming is my number one most reliable way to fall asleep, when I would be lying awake between 20 and 60 minutes otherwise. I get through one page at most before I doze off. When my math teacher in school tried to explain stuff, I just couldn't keep focused and often zoned out right before the important part, because the pace and presentation was completely wrong for me. I just couldn't listen to the guy for long enough. Videos with this kind of idle animation stuff would probably have been ideal for me. I'll see when I start watching his math videos to catch up on some of the stuff I've forgotten over time. The teacher I learned coding from had a much better style and pacing for my needs. Though he probably didn't spend so much time writing code out either, and focused on the basic concepts, supporting your point once again.