The search term you provided is a specific type of "Google Dork." These are search strings used by security researchers (and hackers) to find vulnerable or exposed Internet of Things (IoT) devices, such as Axis network cameras.
: This appears to be a "tag" or a comment added by a user (likely on a forum or "dork" database) to categorize the find or indicate it was used in a specific post. It is not part of the technical exploit itself. What it Finds: inurl indexframe shtml axis video serveradds 1l
title:"Axis Video Server"