I would recognize these sounds anywhere! Starts around 11:38. Sounds like the sounds made when moving around the options in the Dc's bios and then choosing an option in the bios. I think the people in the video select a hiphop beat to play from a CD in the DC bios music selection. You can later see a DC and DC controllers on the desk in the background around 13:13
http://www.youtube.com/watch?v=Vsed6XTsNOg&t=11m36s