All civilizations fail. The ones that matter though, are those that leave a written record of their existence. There is none for the civilizations in Africa. We have Great Zimbabwe, and we have a few other ruins around the continent, but unlike the Maya, or the Inca, or the Olmecs, there is no record of them.
Why is that?
We have Ethiopia, and a lot of traditions from polities like Sokoto, the Ashanti, the Nigerian city states / polities, and the Swahili. Post colonial African culture was pretty rich and diverse. As much as I think this guy is a fake, has little knowledge of the continent in question, and is a and a troll who acts like a racist we should leave Africa out of it. He doesn't represent anything from the continent.