If you run this search and see a camera that is clearly in a private home or sensitive area, do the ethical thing—navigate away. But if you see your own camera? Change your password, turn off port forwarding, and breathe a sigh of relief that you caught the vulnerability before someone else did.
Some DVRs expose a web interface for remote viewing. The "multi" page displays all connected analog or IP cameras. inurl multi html intitle webcam TOP