FWIW, with Firefox on Linux with pihole on my network and ublock origin, some component (or the mix) of those things seems to have meant that so far I have yet to experience a single one of the things Google has been doing since the adblock wars began again. I just checked now to see if there was any delay, and there is not.

I haven't seen a single popup, nor a single warning, no slowdowns, and no ads. I installed freetube in preparation for getting screwed, and although I like it, ad-wise and speed-wise it's no different than hitting youtube directly.

¯\_(ツ)_/¯