New Youtube App Update Allows to Chat with Your Friends

Youtube app recently got an update. After update you can see there is one more tab in bottom bar named shared.

With this option you can add your friends with whom you want to share Youtube videos, so you don't have to use any third party app to share video links. You can add people from your phone book, hangout account or you can directly invite them via link.
One your invitation is accepted, you can share videos and chat with them within the app.