You mean the interview where he acknowledges that the game is canon in a broad sense? Who cares about the minor details of the game, the fact of the matter is that the overarching canon of the series acknowledges that something happened in San Hieronymo, it involved Big Boss, The FOX Unit, and possibly Colonel Campbell, and a direct consequence of it was the dissolving of The FOX Unit, Ocelot getting the other half of the Philosopher's Legacy, the forming of The Patriots, and Big Boss getting the idea of a nation for soldiers.