I have already established this site. It's about 1 year, 1 month old.

The domain refers to PaintBall Videos

PB is universal for paintball. Many corporations including pbstar.com , pbgear.com and pbnation.com also use the abbreviation.

I guess you can also take into the consideration that PB can stand for PlayBoy
When I search google images for my domain, with safe search off, you'll get a ton of playboy pictures

What do you think?