While I was roaming youtube for any Doctor Who clips. I discovered something AMAZING! I found an interview of Matt Smith with a late night TV host named Craig Ferguson. I initially thought that it was from Britain, but no. Matt Smith was on his FIRST American talk show appearance. The whole entire show is a Doctor Who special which was aired on CBS. Even though it was on late late at night, you still see it on the CBS site
legally (I don't think it applies to every country sorry).
This is the full show:
Late Late ShowIf you don't want to watch the full show you can probably just click on the two clips which are Matt's interview and the Doctor Who monologe
A spoiler non-spoiler: Matt mentions that they are filming somewhere that isn't Cardiff look here-->
Utah