You press the "F5" button and then it switches to a view like a small robot is hovering slightly over your head while videotaping you.
It's F5 on the Mac as well, but a lot of Macs have different functions attached to the keys. (For example my mac book pro uses F5 to dim the lights under the keys). If you go to System Preferences, keyboard and Mouse then there's a check box you tick to take off the tagged function.
Once that's done, then you just hit F5 in the game and you'll be in 3rd person mode behind and above your character's head.
Walkthroughs & FAQs