Unity editor controls completely broken - how to fix?

Barely any of my Unity controls work. I cannot pan, orbit or rotate the camera at all. I cannot re-size or move UI elements. Nothing.

Attached below is a Youtube video I made showing my failed attempts to move the camera around.

I have tried clicking basically every button I see, as well as creating new projects in different versions of Unity. Nothing works.

Any help?

Here is a second video, showing how nothing works with the UI controls either: Unity controls completely broken - UI - YouTube

I am not sure if this will work, but see if you are in caps lock, and if so turn it off