Here’s a separate thread.
This is a pretty good HowTO: https://youtu.be/ZYxD263iS1E
There’s a premade Rpi image called Hyperbian that runs the Hyperion software, run an HDMI capture through it and you’re good to go.
The really nice thing about the raspberry pi software is that it can interface with a bunch of different LED setups.
You can control them with a logic level shifter on your Rpi, or use an existing WLED setup.
My 75" TV took over 5m of LEDs around the very outside edge, so I had to mount mine in a couple of inches to avoid needing to add extra lights.
Configuration of Hyperion can be a bit daunting as it’s not super intuitive, but even my dumb ass was able to get it going, and I’ll be happy to answer any questions if you guys hit other pitfalls.