I did the trial just so I could watch a season of a show. Premium is crap though because they don't offer you anything better than what Netflix and Hulu are already presenting to you. I rarely stream. But I think Youtube needs to make some major improvements to their Premium project. It just doesn't have a lot to choose from.
I don't pay to watch any streaming network. I paid for it back when I was married with my ex wife. But I never watched it. I buy and collect movies on blu-ray, yeah I guess it's a dead format now. But I like it leagues better than something that costs you a monthly fee. What I didn't like is that these streaming channels don't always have movies or shows that I wanted to watch. So I felt it was a waste of my money. Why pay for a streaming network when they don't have what you want?
I can't justify the youtube premium. It is more expensive than netflix mobile plan for me. My netflix mobile plan is 2 dollars per month for 1 mobile. Whereas the youtibe premium is 10$ or more per quarter depending on music plus video sub. So not worth it for me.