Master Chief nukes some Covenant in this CG trailer for Halo: The Master Chief Collection.
Halo Nightfall - First Trailer
The first trailer is out for the Halo Nightfall movie.
Halo 4: Spartan Ops - Episode 4
The fourth CG episode is out for Halo 4: Spartan Ops.
Making Halo 4 - Part 1 and 2
Join 343 Industries on a 20 minute behind the scenes featurette on the creation of Halo 4.