YouTube Introduces One Channel
With the new One Channel, operators will be able to create a trailer that shows off the nature of your channel, compelling viewers to subscribe to it. You will also have a new custom art background which will look good on desktops, tablets and various mobile platforms. Ultimately you can also organize the way in which the videos are streamed that better matches the programming strategy of your channel.
Currently people can revert back to the old way their channel looked, but YouTube will be converting all channels to the new look very soon.