One could make the case that the minor v is functioning like the the upper three notes of a V9/IV, resolving deceptively to ii. That's how the voice leading would work, anyway (although voice leading isn't really happening in this case). Obviously, B and C# (the lower two members of the hypothetical V9/IV) aren't present, but they were there in the previous chord.
Weird sidenote -- that Youtube vid is tuned down a half-step from the soundtrack CD.
EDIT: Another way of looking at it: In the context of B major, we expect A-sharp to resolve up to B and A-natural to resolve down to G-sharp. In the case of this minor v, the A-natural resolves to G-sharp (in the ii) just as we expect it to.