very few tube themes that are good. why i say that? because what is a tube for? to keep people on the page and to make sales by selling ad space and/or paysite memberships. most designers have no clue how to make a theme for both. surfers know what a real tube site look like and if you dont have the skills to customize even the theme you just paid for like this tube theme you will waste a ton of time and money spinning your wheels. so far this year i paid for over $300 in wordpress themes.
Im currently using only one
http://demo.dedepress.com/detube/