I don't have a premium membership, but it hasn't hurt me too much. I registered so I can see livestream videos, and I also found some obscure Kajiura-sensei and See-Saw songs there that I couldn't find on Youtube. It's not as varied as Youtube, but it's pretty good. I also like the instant-comment feature, although big amounts of comments going across the screen can get annoying. (There is a way to turn them off, though.)