Override <space> key for a particular site

[limaceous-bushwhacker]

How do I override space key to run f+h (follow and click h link)?

EDIT: I want to use space to pause/play video on YouTube.

[limaceous-bushwhacker]

Ok, I found how to do that by using map <space> LinkHints.click match=<CSS selectors>. How can I apply this to only on YouTube?

[limaceous-bushwhacker]

Might have finally figured it out. Is that the best way to do it?

env yt host="https://www.youtube.com/watch"
map <space> runKey expect="yt:<v-spc>" keys="<v-space>"
map <v-space> scrollFullPageDown
map <v-spc> LinkHints.click match="<CSS selector>"

[gdh1995]

Congratulations! This is just the recommended mapping.