looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
I rarely use Youtube, but this would help boost free/libre alternatives. I use Gmail web, which means Thunderbird-only or switching back to my own mailserver. Drive, there is Nextcloud. Maps, I mostly use Osmand. Search, I use ddg but here's good point to use p2p and speciality search engines. Android, guess why I'm using Lineage OS. OS X, guess why I'm using Linux, or could switch to *BSD.
Google can continue to devolve into a shittier version of a walled garden that is Apple.
Front ends might not be classified as approved environments, though..