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Freetube is the best way to watch YouTube
(www.popsci.com)
This is a most excellent place for technology news and articles.
apparently freetube automatically uses a new invidious instance every time it starts up.
It seems to be at random, and many of the instances don't work correctly. You're better off finding one that does, and setting it as default.
Or host your own :) less likely to be blocked by Google if it's just you using it.