Another Capture Card Topic

[BotherRed]

I have already looked through this particular topic, which was made back in 2017, and I will think about the suggestions provided in that topic.

However, I've personally become drawn to "The Elgato 4K Pro" and the "Elgato Cam Link Pro" mainly because they are PCIE capture cards, so I can slot them in and forget about them.
There are 'pucks' and USB sticks, but I don't want anything loose, i.e., something that could get unplugged or damaged if one were to bump into it. A PCIE card is safe within the case. 

I am trying to start streaming, but mostly right now as I type this. I'm looking for a more effective method of capturing my Wii U audio, specifically for the purpose of passing it along via Bluetooth. Right now I'm using the Jabra Elite 8 earbuds and using the included USB-Type C to 3.5 MM Jack, plugged into the headphone jack of my monitor, the LG 27GR95QE-B, which seems to be slightly larger then 3.5 or something as the included jack is quite loose and often needs to be turned to the 'just right spot' for the audio not to sound distorted.

I'm leaning slightly more towards the Cam Link Pro just because it has multiple inputs but no outputs from what I can tell. That would mean that I'd have to open something like OBS to use my Wii U as it'd be connected to the capture card with no pass through to my display, which I think wouldn't be that bad of a trade off—but just wondering if anyone had any ideas or suggestions they'd like to offer up.