The Halo Reach 2009 teaser trailer that follows the camera around the planet.
This is assigned to the Halo Reach menu.
Tutorial:
1. Create a backup folder inside of folder: Halo The Master Chief Collection\MCC\Content\Movies\Backup
2. Take the initial file (FMS_hr_bg) and place it inside of your Backup folder.
3. Insert the new replacement file of the same name into the Movies folder.
If you want to revert back to your original menu, simply move/delete this replacement file and place the original back into the Movies folder.