"Machinima"

There's a new kind of entertainment now: video episodes "filmed" inside a multiplayer video game.  It's called "machinima."

YouTube - Red Vs Blue Episode 1

This is a long-running series based in the Halo world.  You have a few soldiers from Red Team, with apparently nothing to do.  They sit around, make conversation, and make fun of the new guy.  The production quality is excellent, and the dialogue is very clever.  I don't play Halo, but this stuff is worth watching.