It is important to note that the inurl:viewerframe mode motion upd string is primarily a relic of the IoT security nightmare. Modern IP cameras (2020+) have largely moved away from this vulnerable applet architecture.
While security through obscurity is not perfect, changing your HTTP port from 80 to a random high port (e.g., 49155 ) stops automated scanners. Combine this with a 16-character password. inurl+viewerframe+mode+motion+upd