How do you switch to full screen to watch a video?

To switch to full screen while watching a video, look for the full-screen icon, usually represented by two diagonal arrows or a square, located in the video player controls. Click on this icon to expand the video to full screen. Alternatively, you can often press the "F" key on your keyboard or double-click the video itself to toggle full screen mode. To exit full screen, press the "Esc" key or click the full-screen icon again.