Yes make, make install seemed to run fine. modprobe didn't return anything though, but no errors either.

nevermind, I see where you got video working

this is another git site for your driver, at the bottom of the readme has some suggestions to fix problems.
https://github.com/aircrack-ng/rtl8812au

Ah, thank you so much for this! I will check it out immediately. Do I need to uninstall the previous drivers somehow?

try the suggestion for networkmanager first, and if that doesn't work try one of the usb mode switches.

Ok so I've read a little about using make uninstall, but that only works if the author of the drivers chose to add an uninstall. My question is where do I run the "make uninstall" from? And also if I don't manage to uninstall it should I just try installing the new driver or am I better off reinstalling the entire OS?

In the same directory that you ran make and make install
That is what I would try first.

Posting this from Debian and I'm a happy camper. Thank you all for helping me with this. Now it's time to explore! :)

Great you got it working.