There are more than a few alt youtube client alternatives on f-droid.

... for desktop use ...

Not 100% sure it supports login, but it does support this, which is like 90% of the way there:

> Import Subscriptions

> Import your subscriptions from YouTube to see your feed instantly

	▲	Telaneo 6 days ago \| parent [-]
		Freetube doesn't support logins. It also breaks every now and then as Youtube does their thing, but the devs are usually pretty ontop of it.