So, that
bad video of someone playing
Call of Duty: Modern Warfare 2 in third person mode? Yup, that's something new to the game.
Joystiq got confirmation from Robert Bowling of Infinity Ward saying the feature is only available in private matches and servers listed as such.
When it's enabled, everyone will be in third person mode giving you a new perspective. It sounds interesting and all that but probably not something I play a lot. Still, I'm glad IW is adding something in there that's different from the previous series.