The guys at IGN have published a bunch of videos from HaloFest, a lot of which are exclusive, so they are worth sharing. Check them out...
* EXCLUSIVE – 343 Talks Halo 4
* EXCLUSIVE – Halo CE Anniversary Solitary Map Flythrough
* EXCLUSIVE – Halo CE Anniversary Ridgeline Flythrough
* EXCLUSIVE – Halo CE Anniversary Installation 04 Flythrough
* Halo Fest Show Floor Tour/Preview
* Halo Anniversary Multiplayer ViDoc