You can also introduce hotkeys for functionalities I have never seen in another player.
I use this (input.conf) sometimes to normalize the brightness and colors of a scene I'm watching (may not work when using hardware decoding):
n vf toggle normalize=smoothing=100
Or rotate a video: Ctrl+r no-osd cycle-values video-rotate "90" "180" "270" "0"
[1] <https://github.com/occivink/mpv-scripts>