Below is an article discussing the technical nature of this query and how to secure these devices.
: Often refers to the "Update" or "Refresh" mode used in the browser to pull live MJPEG or JPEG streams from the camera. Security Implications inurl indexframe shtml axis video server upd
Thus, the dork doesn't just find cameras—it sometimes finds cameras that are completely unprotected or trivially bypassed. Below is an article discussing the technical nature
Secure configuration