The term "young-bbc" in a porn video context refers to a scene or content that features young men with big, black (or large) penises. In this case, "young" denotes the age group of the performers, typically implying that they are in their teens or early twenties. "BBC" is a slang term for a large black penis, derived from its British origin. This tag suggests that the video contains scenes or performances that showcase these young men with impressive endowments