Ensure your "Share" or "Public" settings are turned off.

To confirm your search works, here is a real, public, legitimate view.shtml feed (a traffic camera in Norway – publicly intended):

Many network-connected cameras (IP cameras), especially older models or those from specific brands like AXIS, use a file named view.shtml index.shtml as their main live-viewing interface.

Users typically use these "dorks" for a few different reasons: Google Dorks | Group-IB Knowledge Hub