Synchtube lets you do exactly that. You can share any YouTube video and chat with your friends in real-time while the video plays. You can join public or private chat room, add a video and invite other friends to join you. If you are creating a private room, you will be assigned as leader of your room. As the leader, you can play or pause the video, and your friends would be notified on their screen about your action. These are the basic steps to use Synchtube:

Join a public room or create a private room for yourself.Paste the link of a video in a box provided.Click “Load Video” button.A unique link is created for the room and you can share that with friends.Start playing the video.You can chat with any member of the room on a common chat window.Leader can pause or stop the video.

Features

Real-time sync and sharing of YouTube videos.Real-time chat and discussion on video.No registration required.It is a pure web app, no software download is required.Upto 4 people can join a chat room.

Check out Synchtube (UPDATE: Synchtube is no longer available) for sharing YouTube videos in real-time. Also learn how to download a Youtube video.

Synchtube  Watch Youtube Videos With Friends In Real Time - 68