Google has become better at filtering out sensitive or "vulnerable" device results from its main index.
While it might seem like harmless fun to watch a rainy street in London from your desk in New York, the "viewerframe" keyword highlights a massive security flaw:
Newer cameras require password setup upon first boot.
Most of the cameras found through this search were accessible simply because the owners never changed the default settings. They plugged the camera in, it worked, and they assumed it was private. In reality, unless a password is set and "public viewing" is disabled, the camera is broadcasting to anyone with a search bar. Is it Legal?
To understand the keyword, you have to understand how Google "dorks" work. A "Google Dork" is a specific search query that uses advanced operators to find information that isn't intended for public viewing.
Today, finding "the best" live feeds using inurl:viewerframe?mode=motion is harder than it used to be.