Google has started rolling out a staged YouTube for Android update, and it's probably the biggest redesign the app...

Google has started rolling out a staged YouTube for Android update, and it's probably the biggest redesign the app has seen yet. 
http://www.androidpolice.com/2013/08/19/breaking-massive-youtube-for-android-v5-0-update-brings-brand-new-ui-in-app-multitasking-and-much-more/