If you are an avid YouTube watcher, you might have noticed the absence of one fact- YouTube does not allow you to watch multiple videos in one window. A feature which is potentially extremely helpful as it  creates a much better and smoother user experience. (Think of flipping through an avalanche of tabs, or in worse cases,-multiple windows  for viewing multiple videos.)

This service, You3B allows you to watch at least 3 YouTube videos on the same window. You just need to enter the separate YouTube URLs in the fields given and play them. If you want to watch all of them simultaneously (for some reason) and yet want to listen to only one of them, you can mute the other two. Else, you can pause them.

That aside, You3B also allows you to check for similar videos and provides a (very handy) low bandwidth version.  Cool staff which comes for free.