We recently switched to using a Linux Mint laptop with an adblocker for our streaming (while also cancelling a bunch of services). A friend at the recycling center set it aside for me - the screen was irreparably smashed but it was otherwise quite a nice little laptop. Replacement screens were too expensive so I carefully removed the broken one entirely so it'd default to the HDMI port and then set it up as a quick media center (we watch a lot of YouTube and the ads were driving me crazy, I might switch to a more purpose-built OS eventually). The TV is one I pulled from an ewaste bin to replace my previous ewaste TV after it finally gave up. It has a thin line through one edge of the screen occasionally but is otherwise fine. I also recently found a perfectly good wireless trackball mouse and a Bluetooth keyboard in the same bin where I got the TV (came with that other mouse). The bin even supplied HDMI cables. The whole thing is perched on a particle board TV stand I found like a decade ago when the college kids move out.
I'm a huge fan of rom archives! A few years ago I built an arcade cabinet using as many secondhand parts and materials as possible and set it up to run a ton of games on an ewaste retropie. It took months longer to make than it would have if I'd just gone to a lumberyard but I had the space and time, and I was already on the local free groups daily so keeping an eye out for stuff from my parts list wasn't hard.