Well, take a look...
The curious thing is, if this actually is a BBC Worldwide trailer in celebration of Doctor Who...it's not appeared on the BBC Worldwide channel; this appears to have been posted solely by this Youtube user. And no one seems to have a version besides this one without the subtitles, even though you'd expect a trailer made in English to be, well, released in English. So it's odd.
On the other hand, it is a very nice trailer, with all that material from "An Unearthly Child" and whatnot, and it was weeks before anyone at BBC Worldwide thought to post a good and non-spoilerly vid of Peter Capaldi in "Neverwhere" even though that's a screamingly obvious tie-in. For all we know this trailer is something that a BBC Worldwide affiliate in Asia put together for release on local telly and some kind soul copied it for international enjoyment.
[We heard about it from Den of Geek, who do think it's genuine, and it very well might be. Still. Internet.]