Unlike 343 Industries, those Bungie behind-scenes werent used for marketing, theyre only available in limited editions as bonus content. Most of those Bungie devs arent working at the company anymore. 343 Industries rarely talks about development in those making-of videos, theres no explanation or justification about anything in Halo 5 behind-the-scenes. The few you can find only shows contradictions with Bungie vidocs. If this video wasnt enough I invite you to watch the following sources below.\r
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Halo 2 Behind the Scenes: \r
Halo 3 Anatomy Of A Game: \r
Halo 3 ViDocs: \r
Halo 4 Making-of: \r
Halo 5 The Sprint: