If a video is labeled as 1080p, but you suspect it may be upscaled 720p content, there are a few clues to look out for. One of the giveaways is if the video appears blurry or lacks detail, as upscaling can result in a loss of image quality. Another clue is if the video's aspect ratio is off or if there are visible issues with the way the video is displayed on the screen, such as jagged edges or a jello effect. Upscaling is the process of enlarging an image or video's original resolution to fit a higher definition screen. This can be done through various methods, including nearest-neighbor interpolation and the use of AI-based video upscaling programs. These programs utilize advanced algorithms, machine learning, and deep learning models to analyze the input video, add additional pixels, and enhance image details to create a high-resolution 4K output video. It is important to note that upscaling may not always result in a significant improvement in video quality, as it depends on the original resolution and quality of the source material.