Earlier quoted context omitted.
YouTube's keyboard handling is Insanely Intuitive™, I must absolutely agree. Usefully, the up/down keys don't change the volume unless the player is also focused. What's incredibly sad is that j/k/l were agreed upon to rewind/pause/forward the video, and these generally work unless you're in a textbox... but dedicated keys were not similarly approved to control the volume. -- My current winner for Absolutely Favorite…
> Vim "up" [j] is assigned to "next", and Vim "down" [k] is assigned to "prev". j is down and k is up in vim
Edit: I've wondered whether the Dance Dance Revolution on-screen arrow order https://en.wikipedia.org/wiki/Dance_Dance_Revolution#/media/..., which I also have deep in my muscle memory, is somehow also related to the hjkl arrows (as it also goes ← ↓ ↑ → horizontally).