The porn video tag "fortnite-calamity" refers to a specific category within adult content. This tag is derived from the popular video game, Fortnite, and Calamity, which is a skin or character appearance in the game. In this context, the tag represents adult content featuring characters, scenarios, or themes inspired by the Fortnite game and specifically focusing on the Calamity skin. The tag helps viewers find videos that are related to this particular combination of video game elements and adult content