This is a Google (or Bing/Yandex) advanced search operator. inurl: tells the search engine to look for pages where the following text appears inside the URL (Uniform Resource Locator) itself, not just in the page body. For example, inurl:admin will find all indexed pages with "admin" in their web address.
This is the most important part of this guide. inurl viewerframe mode motion my location work
While the search itself is legal (Google is just indexing public pages), accessing unsecured cameras can be illegal or unethical. This is a Google (or Bing/Yandex) advanced search operator
Recommendation: Do not click on live feeds unless you are certain they are intended for public viewing (e.g., public traffic cameras, ski slope conditions, or animal exhibits). Recommendation: Do not click on live feeds unless
Taken together, the phrase appears to search for web pages or apps whose URLs include "viewerframe" and that implement a mode for motion-based or geolocation-aware viewing — likely looking for examples, demos, or troubleshooting pages where "my location" functionality in a viewer frame works.