An update for the YouTube mobile app, for both iOS and Android, is being rolled out right now and features some useful improvements to the user experience on the app. Android Central reports that the YouTube app will get some new gestures for full-screen mode and video chapter lists, among other new features.
The new gestures that will navigate the YouTube mobile app are focused this time on full-screen mode: now you will be able to enter full-screen mode with a swipe up and close it with a swipe down.