> how many people finally get it because of animations and playing with the maths instead of some old dude drawing a formula on a blackboard

Visualisation helps of course, but if you want to be good at maths, you need to put the work and try to solve tons of problems. Most of what 3blue1brown shows in his fancy videos are things you can drawn on your own on a paper, and if you've never done it yourself, chances are you don't understand.

The problem with digital tools is that it's easy to get distracted. If you watch 5 minutes of 3blue1brown and then 20 random videos, it's not going to help.

Of course you need to put the work in. But visualisation and directed play really does wonders. I don’t understand why maths teachers generally take a math perspective and not a “bored kid with no math inclination and who doesn’t see the beauty in it yet” perspective, since that’s the target group he’s supposed to be reaching..