Pretty sure the guy in the twitter vid doesn't know or care about any slavery other than the American Black experience, so that's the context.

I'm certainly aware of other contexts for slavery, but both the guy complaining and the media will pretend they don't exist. They aren't particularly relevant to the American Black experience, either, except maybe for Liberia.

Why do you think they're contextually relevant when I was talking about American chattel slavery in reference to American pejoratives?