EB Expo 2012

[OceanH]

GameSpot's Stage Demo

Halo 4 Stage Demo - EB Expo 2012 - YouTube

[LickableLemons7]

Be sure to let people know that there are spoilers at the end of the demo...

And you can hear the gameplay better in this one.

Halo 4 - "Forerunner" Campaign Demo (10+ Minutes) - YouTube