I just bought a new AX50 to replace my very old and outdated router, and while it seemed to go smoothly at first, I've noticed websites and especially videos now will not load reliably accross multiple devices. (YouTube/Reddit videos seem to be the worst)

Usually after reloading a few times they will eventually kick in, but this never happened with my old network and I've never run into this before.

It's incredibly frustrating. Any ideas?