Probably a pre-rendered video would do better.

Since seeking is not required, it could do away with keyframes entirely.

For sure, even a good .gif file

I'm interested - what difference does keyframes vs no keyframes make?

in the credits u should put the link of Lucas as the first one, since this is basically a rip of from the Codrops demo. (like most if not all the things u post)

This could probably be solved at the GPU