YouTube has more tricks up its sleeve than you might think—including a built-in video editor and tools for the extra paranoid—and you can actually use the regular YouTube site to record anything happening on your computer screen. From showing off an app to the world to showing the grandparents how to use Skype, there are all kinds of ways it can prove helpful.
Head to YouTube’s beta live streaming events page and click Enable live streaming—you’ll then be asked to go through a simple verification process. When that’s done, click Create live event (don’t worry, you won’t be broadcasting your desktop to the world, unless you specifically want to).