I use openweathermap and it works great for my needs and it’s free (they switched to an account based service recently but still free for small stuff)
For internal temp sensors, I use my ZigBee thermostat and a window AC unit that has a temp sensor available to Home Assistant.
Nothing fancy for me, yet anyways, but works for my needs.
Since you can’t use GPU for rendering or recording, a faster CPU couldn’t hurt and is probably your best bet, but it isn’t really thaaaat old. (There being no other hardware bottlenecks of course)
There are, cough cough I think, ways to decrypt and record HDCP protected streams but I’d imagine you’d have to have a render unit and recording unit in your setup. Sort of complicated.
Ah bummer. That’s most of my software tricks. I’d break out my hardware equipment next step, but that’s pricy.
That PC should be able to play a stream just fine. I’d check if there background apps hogging resources and make sure hardware acceleration is active. Scale the resolution down (no point of upscaling 1080p content) and record to a lower resource intensive format, perhaps h.264 vs h 265/HEVC.
Yeah, just seconding your internet source recommendation. The price was right.