Also, shortcuts that work without focussing the video. Press space to pause the video, it scrolls down instead. So you learn about "k" which pauses without focus, great. Then you want to skip forward/backward with the arrow keys. Again, doesn't work without focus...

"J" and "L" skip backward and forward respectively. (Lowercase works as well.)

There are shortcuts to change the speed! > to increase, and < to decrease.

Wow I was never able to find these, TIL.

Thanks!