Authorized by not denying…

I have tried a yubikey on ubuntu without any problems. Could you please describe what exactly isn’t working

A video on youtube…

You might need to switch to a smaller instance.

If you want a kali-based live environment, you can follow this tutorial: https://www.kali.org/docs/development/live-build-a-custom-kali-iso/ You can configure a lot of options and most of the building process is just downloading packages.

Many ARM boards (including raspberry pis) are designed to run with linux. So the manufacturers can customize the kernel and firmware for the boards.

I can’t tell you why but it seems like plasma crashed (-> screen black and all opened programs gone) and restarted (-> came back). That’s what I can tell from your description. In your logs you can look for errors from plasma, kwin and maybe something with the gpu driver.