I also want to point out (since nobody else has) that YT has done shenanigans like this in the past. Invidious is not going down without a fight.
UPDATE
As of 2 weeks ago, Google has begun blocking multiple instances from accessing their services. This also includes my own instance and appears to be done alongside the C&D. (Note: I have not received one yet.) I'm currently playing whack & mole with Google and will be moving between several different servers. Some others are going through IPv6 addresses (which didn't work for me.)
I love these privacy-friendly front ends for big tech websites. I guess it was only a matter of time before Go.ogle started fighting Invidious/Piped instances.
If you haven't already checkout the plugin called "Privacy Redirect" for Chrome/Firefox. There's also an android app version called UntrackMe (I think?). They basically intercept YouTube/Twitter/Reddit links and redirect them to privacy-friendly instances.
Freetube is already broken for me.
I only use it as a centralized following channels plataform (to get the updates from the channels i follow) and then get the indivious link and open it in the browser!