With 4K and HDR becoming the norm, why would anyone specifically search for "Person of Interest 480p"? There are several good reasons:

Many fans still swear by the original DVD box sets. DVDs are natively 480p and provide the highest possible bitrate for that resolution, often looking better than compressed 480p files found online. Tips for the Best Viewing Experience

Many viewers use older CRT monitors or early-generation flat screens in workshops, garages, or spare rooms. These displays often cap out at standard resolutions.