The porn video tag "british-gay" refers to a specific category of gay adult content featuring British performers or themes. This type of content typically showcases male-on-male sexual interactions and is intended for an audience interested in this particular niche. British-gay videos often involve actors or performers from the United Kingdom, who may speak with a British accent, engage in stereotypically British activities, or simply feature settings that are characteristic of the UK. The tag emphasizes both the gay aspect and the nationality/cultural context associated with it.