[kelseyfrog]

What are you talking about? You can click on any of the lessons and get text and images. https://www.3blue1brown.com/lessons/essence-of-calculus

[lanfeust6]

Which aren't videos. The entire draw is the video format.

[kelseyfrog]

That seems awfully particular.

[schoen]

Grant Sanderson's mathematical animations and visualizations are famously excellent, though. He developed his own mathematics animation software just for his channel. I wouldn't think of video as preferable to textbooks for math education in general, but for his sort of videos, I might!