I've contributed technical animations to some videos by science communicator Steve Mould.
Treadmill vs. Real Hill: Which is harder to run?
The Lever Paradox
[https://www.youtube.com/watch?v=kY2YeM5fNDw]
The experiment that revealed the atomic world: Brownian Motion
Saddle shaped mirrors are really weird to look in
You Can't Bounce a Ball Under a Table