Oh you’re right, I just realized that I have the 4th gen, I bought it 2 years ago in bad shape without remote for 50 bucks. I wanted to recommend that one and I am surprised to see that they haven’t gone down in price since then. The 4th gen seems to still support Netflix. Would that be an option for you?
For display I use a Fujitsu E22T-7, very nice 21,5“ 1080p led with speakers. Got it 4 years ago for 30 bucks. Fujitsu B22T-7 seems to be similar and more widely available on eBay here.
I have it vesa mounted on a monitor arm in the kitchen, those are around 40 bucks new. I imagine those to be great to use them around the bed to mount them in a position that’s comfortable if you want to watch in a laying position.
If you prefer a pc GeForce 8000 series seems to be the lowest end option, the 8400gs should be the cheapest. I have a pci version and want to try if I get YouTube 1080p to work on a Pentium 3, but probably a Pentium 4 is required for SSE3 or something. On Linux the nouveau driver is supposed to support the va-api that is required by firefox for hardware acceleration. Nvidias own driver doesn’t have vaapi but only vdpau which Firefox can’t use. There is a translation layer driver but it uses nvdec and supports only from 400 series or later I believe.
And sandybridges internal gpu should also do the trick for you. Those get extremely cheap over here. The dell optiplexes that are not sff but standard size desktops get basically thrown away sometimes, or sold for 10 bucks.
Also 2011 iMacs with builtin display and speaker are around 50, I got one for 5 even, windows 10 or Linux runs fine on them I think. They have those amd 4000 or 5000 GPUs i believe. The new Mac OS works with OCLP, but the GPUs is struggling in Mac OS, which is why people throw them into e-waste.
Raspberry Pi 4 seems to also do the job: https://pimylifeup.com/raspberry-pi-widevine/