Specifically, this operator tells Google to look for web pages whose All in Title (the entire page title) contains both "Network Camera" and the combined word "NetworkCamera". This is a legacy technique that was often used in the early days of IP cameras (around the early 2010s) to locate unsecured, publicly accessible camera feeds.
Understanding the Google Dork: allintitle network camera networkcamera full allintitle network camera networkcamera full
Never leave a network camera on its factory-set username and password. Specifically, this operator tells Google to look for