http://www.omgubuntu.co.uk/2011/10/desktop-youtube-app-minitube-updates-adds-social-features/ Anyone?
here one more the advantage of it is you dont need flashplayer http://www.webupd8.org/2011/10/install-minitube-16-youtube-desktop.html
For me minitube rarely worked. When ever i gave a search it keeps adding on the result but no way i was able to play the music