Upscaling does the opposite—it increases a video's resolution. For instance, a 1080p video (1920x1080 pixels) can be upscaled to 4K. While upscaling doesn't add new details, modern methods use smart technologies like AI to make the video look sharper and more detailed. This makes upscaling perfect for bigger screens or high-resolution devices, giving you a clearer picture even if the original video was lower quality.