I can tell you, as a young person (25-years-old, so relatively young), that bareback sex will sell itself. No one likes using condoms unless they outright fetishize them. BUT, if you're seeking an edge in that demographic against other sites, that could be accomplished through fresh, competent web design.
Think: Vimeo.com, Devour.com. Clean, modern, community-driven, and in high definition. Standard definition hurts young eyes. Also using H.264 or HTML5 video codecs for mobile devices like iPods and smart phones is a huge opportunity for young audiences. Young people are mobile. I've been stranded plenty of places with just my iPhone when I needed a quick porn fix and phone-friendly sites like Gaytube.com get that job done.
Phones are glamorous now, and porn on your mobile can be too, by extension. Look at the success of GuysWithiPhones.com
Give boys a fast, free, and elegantly put together tube site catering HD and on-the-go playback and you're golden.
Can't emphasize web design enough. Websites like BBRT are so fucking dated looking it's no wonder they have mostly older users.