Here's the second episode of Halo 4: Forward Unto Dawn.
Halo Nightfall - First Trailer
The first trailer is out for the Halo Nightfall movie.
Halo 4 Spartan Ops Episode 8
The eighth CG episode is out for Halo 4: Spartan Ops.
Halo 4 - Composing Worlds
This developer video for Halo 4 shows how the musical score was created for the upcoming sci-fi game.