YouTube 2.1 now available for Android phones running Froyo or higher
Other changes, many of which have already been included on the last upgrade, include being able to rotate for full-screen playback, new controls and a new UI design. Google says this was built from the ground up to copy the desktop version of the application and is the fastest and most intuitive YouTube client ever offered. The upgrade also took on the extermination of some bugs and improved playback performance. It is now easier to view new videos from your subscriptions and if you are signed on, you will see all the updates on the home screen.
The newest version of YouTube is available to those Android phones running Android 2.2 or higher. It is a free download from the Android Market and comes pre-installed on phones running Gingerbread like the Google Nexus S. While most of the visible changes in the app could be seen in build 2.0, here is how the YouTube client looks coming out of the box on the Nexus S.