We do not have the YouTube icon on the home screen, so we can access it through the Apps menu. It's in the bottom right-hand corner of our home screen. It's a gray box with a set of white squares inside of it. This will open a list of all of the applications that we have downloaded.
Scroll through the list to locate a video to watch, and open it by tapping on it. A very easy way to make the video full screen is simply by turning our phone on the side. To do this, we will need to make sure that "Screen rotation" is activated.