While searching for these terms is not illegal in itself, accessing the feeds raises ethical and legal questions.
The search string inurl:viewerframe?mode=motion is a well-known used to find unprotected live feeds from network cameras, specifically those using the Axis Video Server or similar software. What this search string does inurl viewerframe mode motion fixed
http.title:"ACTi Web Configurator" 200 OK While searching for these terms is not illegal