In case you're not aware, 3B1B has a Github repo for the engine he uses for the math animations so that others can use it to make similar things: https://github.com/3b1b/manim

There's also a loose group of people already doing the visual learners "explainers" thing over here: https://explorabl.es/ (you can scroll down for links to tools they use to make their explainers).

But yes, I also feel this is an important development and that this should be an ongoing way of teaching people things. Formal education has IMO stalled out around the printing press but there are massive opportunities on computers (and especially on globally networked computers) to take that a step further and leverage the capabilities of computers to make education even more engaging and information-dense.