I use Straight Talk Home Internet with a router, and I'm curious if anyone has a way to limit bandwidth of specific devices drawing from it, or if its possible to route a secondary router to its internet connection to do that.

It's much faster than my old router's speed, however we have many smart TVs in the house and they like to take as much as they can to get the resolution as high as possible and won't allow me to limit it on their end. My old router allowed bandwidth limiting so I locked the TVs to just enough speed to allow for 1080p which was more than enough for what we needed, and allowed us full speed on everything else. This router doesn't have that though, and I'm curious if theres any work arounds to that, or if its possible to connect a secondary router so I can get the speed of this but the control of that one.