Video resolution refers to the amount of detail an image holds, typically measured in pixels. It is expressed as width x height, such as 1920x1080, which indicates the number of pixels in each dimension. Higher resolutions provide clearer and sharper images, making them ideal for large screens and detailed visuals. Common video resolutions include HD (1280x720), Full HD (1920x1080), 4K (3840x2160), and 8K (7680x4320). As technology advances, higher resolutions become more accessible, enhancing the viewing experience in movies, games, and online content.