The trailer for the new season of Doctor Who has been showing in theaters in the UK for some time now, but they have released a high-quality version of it on the BBC website. Unfortunately, because they don't understand the power of American bloggers, they made it available only for people in the UK. So naturally, it's now up on YouTube. Spoilers ho, of course!
I suspect it'll get taken down, but I also suspect it'll pop back up on other peoples' accounts, so if this particular one doesn't work, taker a look around. In my rationalizing head, this is an act of civil disobedience. It's what the Doctor would do.