In this example, the 'Home screen' is customized and might look a bit different. The icon is red framed with a triangle inside of a white square that looks like a TV screen. Tap it once to open the application.
It should automatically take us to the 'What to watch' page which will be either specifically recommended videos we've watched (if we're signed in), or if we're not signed in, it will be the most watched or most popular videos on YouTube at that time. We can refer to the article on how to sign-in to 'YouTube' on the iPhone 6 if we don't know how to do so. Tap on a video to open it.
Tap on the gray translucent '+' icon at the top of the screen to bring up a new panel
As we can see, if we press pause by tapping on the video display it will bring up multiple options around the edge of the video. The triangle/vertical line icon in the middle is the 'Play' or 'Pause' button. When the video is paused the options remain around the edge of the video.