The main difference between SD and HD is the number of pixels used to form an image. SD has fewer pixels, which makes videos look softer or slightly blurry, especially on large screens. HD contains more pixels, which results in clearer, more detailed, and more realistic visuals. This difference becomes more noticeable when watching on TVs, monitors, or high-resolution devices. https://clippingexpertasia.com/blog/sd-vs-hd-resolution/