Yes exactly, if you install the package you don't need the download the solver on the fly. AT least that's my understanding of what the package is supposed to do. Personally I have no need for it.

https://aur.archlinux.org/packages/yt-dlp-ejs looks like what you need?

I am exactly like this. Great description.

Interesting!

I experience visual dreams the same way I described imagining the environment when I read. It's a completely different experience than seeing with my eyes open.