(the "search engine for the Internet of Things") and Censys are the primary sources for this data. They continuously scan the entire IPv4 address space across all ports, including 8080. They index banners, HTTP titles, and even screenshots of web interfaces.
A simple search string like highlights a massive global cybersecurity vulnerability. It represents the exact queries that malicious actors, privacy enthusiasts, and automated bots use on search engines to locate unsecured internet-connected cameras. active webcam page inurl 8080 link