Google started using IP range blocks recently. If they decide that your IP stinks, they'll block YouTube viewing and demand that you log in.

It's inconsistent as fuck, and even TOR exit nodes still work without a log in sometimes.

I can confirm this. I guess they didn't like me using Invidious.

	▲	ACCount37 3 days ago \| parent [-]
		That's bad enough for normal VPN users who use VPN for privacy reasons. But a lot of countries have heavily censored web, and not using a VPN is simply not an option there. Good on Google for kicking people while they're down.