This suggests the software is configured for motion detection display. The page or parameter is likely showing a view of the camera feed where motion is highlighted, recorded, or actively being monitored. In some systems, mode=motion toggles the interface to show only events triggered by movement, rather than a continuous stream.
Serious security researchers no longer use Google for this. They use Shodan (the search engine for the Internet of Things). Shodan specifically indexes banner grabs from open ports (port 80, 554, 8080). You can find thousands of cameras on Shodan using filters like "viewerframe" port:80.
While this was partially true in the early 2000s, the landscape has changed:
The search string inurl:viewerframe mode motion hotel verified is a specialized query, typically used in search engines like Google, Bing, or Shodan. It is not a standard phrase but a combination of search operators and keywords designed to locate specific types of web pages or devices. Below is a breakdown of each component and its implications. Malicious Actors
viewerframe is not a generic term; it is a specific filename or directory name associated with legacy web-based video surveillance software. This software, often developed by manufacturers like GeoVision or Hikvision (in their older firmware), used viewerframe as a component of the interface that displays live video feeds.