The query you provided is a Google Dork, a specialized search string used to find specific publicly accessible web content that isn't typically indexed for general viewing.
Change Default Credentials: Never leave the factory-set username and password. Use a long, complex passphrase. intitle network camera inurl maincgi link
The search term intitle:"network camera" inurl:"main.cgi" is a specific "Google Dork" used to identify web-accessible network cameras. While often used by security researchers to find vulnerable devices, it is primarily a sign of improper security configuration. What This Search Query Reveals The query you provided is a Google Dork
Some cameras using main.cgi generate a static image snapshot rather than a stream. These can be refreshed or saved, silently archiving footage without the owner’s knowledge. intitle network camera inurl maincgi link