As technology evolves, the prevalence of .shtml files is declining in favor of modern frameworks (React, Node.js, etc.). However, legacy industrial cameras, smart home hubs, and budget baby monitors still rely on this architecture. The query inurl:view index.shtml will remain relevant for at least another decade because:

Sometimes the term "work" refers to manual labor. You might find index.shtml pages showing a bedroom renovation, workmen installing drywall, or a live feed of a construction site where a spare room is being converted into an office.

This specific search string is a well-known example of Google Dorking

For (caution: this finds unsecured devices):