The graphical user interface element that, when activated, expands video playback to occupy the entirety of the display screen on the YouTube platform. Activating this button maximizes the viewing area, removing browser elements and other on-screen distractions for an immersive viewing experience. For example, clicking the symbol located in the bottom-right corner of the video player while watching content on a computer will typically initiate full-screen mode.
Maximizing the video’s visual presentation is crucial for viewers seeking a cinematic or undistracted experience. This functionality enhances engagement, particularly for content rich in visual detail, such as documentaries, films, and gameplay recordings. Historically, the implementation of this feature has evolved with advancements in web technologies and display capabilities, becoming a standard expectation across video streaming platforms.