Sure, trailers for upcoming games usually focus on new things a game is doing, the art of a game, or capturing your attention and finding that one key thing to hook you in.
Halo 4? Nah. They don’t need any help with that. They release trailers of the people who MAKE the game.
This dev diary, entitled Prelude to War, doesn’t have a single spoken word but it doesn’t need to. So, sit back, relax, watch the video and just soak in all the awesome feelings you’re getting knowing that the game is just over two months to being on your shelf.