who are the rest? what signal?

obtainium

I did click it eventually out of curiosity because I'm on Firefox with an ad blocker and privacy tools.

with javascripts being disabled, right? right?

there's a browser extension called libredirect that has a keyboard shortcut to switch between instances. you can also use freetube/newpipe/mpv.

I think it depends on wether google is eating the cookies or not

watch the recent Louis Rossmann videos if the first part is what you don't understand

where shitpost