Google Has Left Almost Nothing of Invidious
At the moment, only 4 known instances still work (there used to be dozens or over a hundred):
They only work (for now, intermittently) because they use proxies or IP pools that the mobsters at Google have not blocked yet. That's not cheap; these folks are ideologically driven and they make it possible for us to make local copies in Free/libre formats that do not traffic JavaScript.
Ultimately the solution may be to boycott YouTube and politely ask other people (or organisations) to stop uploading to it.
It'll only get worse. The "honeymoon" is over.