While the original video was pulled form Vimeo, ForgeWorldMaps grabbed the important part that shows at the end, the title of the next Halo game being Halo 5. Take a look:
http://www.youtube.com/watch?v=3MDYZXp_KQg
So, we have to wonder, why would 343 stay quiet on this? Is it really that big of a deal that they can’t confirm or deny outright that the title is Halo 5? It only makes sense to call it that.
-Sal