The search term inurl:webcam.html is a famous "Google Dork"—a specific search string used by security researchers and hackers to find vulnerable, internet-connected cameras. By searching for specific file names like webcam.html
The camera acts as a server (often on port 8080) and sends a Motion JPEG (MJPEG) or video stream. A simple page, usually named webcam.html , embeds this stream using a MDN Web Docs Taking still photos with getUserMedia() - Web APIs | MDN Inurl Webcam.html