The redesigned YouTube app makes it easier to find what you love. Now your recommended videos, favorite channels, and subscriptions can be accessed by tapping each icon or swiping your screen. You can also create fun videos on the fly with new in-app editing tools.The new app is divided into three sections: Home, Subscriptions and Account. Home, like the YouTube web homepage, delivers suggestions and features videos from YouTube accounts that a user may have viewed recently. Subscriptions is a stream of videos from YouTube accounts a user may subscribe to and Account allows you to access History, Likes, the Watch later feature and Playlists.
While the app was updated today, it's slowly propagating through the App Store.
YouTube for iOS is available in the App Store for free. [Direct Link]