Behind The Scenes

"BTSs", short for Behind The Scenes, are a series of video documentaries released by 343 Industries showcasing a particular feature or aspect of an upcoming game. BTS video documentaries are the spiritual successors to the ViDocs produced by Bungie and Ensemble Studios, though their running times are far less uniform than the seven-minute ViDocs, ranging from two to seven minutes.

Halo 4 had it's own series of video documentaries called Making Halo 4. Halo 2: Anniversary had it's own documentary movie called Remaking The Legend instead of a short series of videos.

Halo: Reach

 * BTS: Defiant Map Pack

Halo: Combat Evolved Anniversary

 * BTS: Anniversary Multiplayer
 * BTS: Anniversary Campaign
 * BTS: Anniversary Terminals
 * BTS: Anniversary Music

Halo: Waypoint

 * BTS: Halo Waypoint

Halo 5: Guardians

 * Halo 5: Guardians Multiplayer Beta: Behind the Scenes

Halo Wars 2

 * Halo Wars 2 E3 Trailer BTS