Screeniac
Screenshots Suck! Screencasts Rulio!

Streams is a new feature available to youtube users. It allows you to create your own video viewing room where you can add all of your favorite videos. Other users can add their videos to your stream but you’re in control of what content stays. If you don’t like someone in your stream, you can give ‘em the boot. There’s also chat in your stream so you can interact with your users in real-time.
Flash Demo