"Eaten Alive" in the context of a porn video tag refers to a specific fetish or fantasy scenario where one person is consuming another person, often metaphorically through oral or sexual acts. This can involve roleplaying scenarios such as monsters, aliens, or cannibalistic beings consuming their partners in a sensual and erotic manner. The tag "eaten-alive" indicates that the content of the video involves this particular fantasy or fetish, intended for adult audiences who appreciate and are interested in these types of scenarios.