Hacker News Reader

IIRC (but correct me if I'm wrong), Youtube works just fine without a login; 18+ content, rating and commenting won't work though.

Well its possible, but its certainly not easy. It asks you to merge your G+ account all the time and is generally just annoying.

I ended up creating 3 pages in g+ for my channel that I don't even use, when trying to avoid G+ Youtube integration.

Then I just gave up and merged them.