Halo 3 ViDoc: Is Quisnam Protero Damno!
From Halopedia, the Halo wiki
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ViDoc: Is Quisnam Protero Damno is a behind the scenes look at the multiplayer in Halo 3. This 7:12 min clip interviews various Bungie employees about the development of the various multiplayer aspects of the game. Included are explanations on the design and construction processes for Halo 3 maps, various features such as the function of the X Button, and a discussion about the Saved-Films feature of the game, as well as footage of several Halo 3 Maps - Highground, Valhalla and Snowbound are featured, but so are two other - one set in a human environment, and another set ina Forerunner structure, with a superficial layout similar to the Halo 1 map Longest