The term "Chad" in the context of a porn video tag is referring to an attractive, confident, and generally successful white male. This characterization often represents a stereotypical ideal of masculinity and has become a meme within internet culture. In adult content, a Chad could be either a protagonist or a secondary character who embodies these traits and may have various sexual encounters or scenarios involving different partners. It is essential to note that this term is often used in a light-hearted or humorous manner and should not be taken seriously in any context other than adult entertainment.