Microsoft has uploaded a half promotional, half educational video about the Microsoft Surface's clever (but expensive) new Touch Cover keyboard, letting us see some of the thinking behind the QWERTY hard-cover combo.

We've already featured an enormous behind-the-scenes look at the tech behind and inside Microsoft Surface in general, but weren't allowed to film the software giant's bizarre collection of cardboard mock-ups (above) and other early keyboard prototypes. MS was clearly saving the video option to boost its own YouTube account views ranking come the Surface's launch. [YouTube via TNW]