YouTube has made a number of changes to its mobile apps, making it easier to view videos filmed vertically. The iOS and Android apps will now show vertical videos fullscreen when the device is held in portrait mode. The update also introduces the option to receive notifications when certain channels update, such as if a new video is posted, and alterations to the way it displays account information to the user. More video updates were also touted for inclusion in the future, including 3D videos.