Xbox Wire also posted an interview with series creator Hideo Kojima, including that video above. They also posted the video below of the Xbox-exclusive mission, called "Jamais Vu."
The PS3 and PS4 versions of Metal Gear Solid V: Ground Zeroes will get an exclusive mission called "Deja Vu." That one features Classic Snake.
Metal Gear Solid V Q&A With Hideo Kojima [Xbox Wire]