Watch2gether is a pretty interesting site where you can watch YouTube videos and host text chats about them at the same time.
The great thing about it is that its very easy to use. To get started enter a nickname for yourself (it could be your real first name) then you enter the main interface for the site. You then invite other people by emailing them the link to your watch2gether session. When they use the link you see them in the chat window area that is to the right of the YouTube video. You can then chat in real-time about any YouTube video you have found or uploaded.
Watch the Video Below to See it in Action