My YouTube app disappeared from the home screen after updating but when going to the App Store to redone load, it says open. When it hit it, it does nothing. Only complaint though, this update is insanely fast on my air 2; I've never felt an iOS device be this fast. Multitasking app switcher lag is now gone (I have over 200 apps and when pulling down to switch to a different second app, it used to lag for a second before). Typing and scrolling also seems heavily improved; eveno Ign to a long website and zooming back to the top doesn't require redrawing the web page any more. This truly is insane performance.