^^^^Seems like they left some stuff out then.
Also, he left out the Sao civilization around Lake Chad. I believe that culture influenced the later Kanem Empire. The romans wrote about the people in the Lake Chad area around 60 AD...this would have been around the time that the Sao was there.
And although there isn't much information about Kemit's trading partner, the Kingdom of the Yam, I believe there is growing evidence that they also were around the Lake Chad basin area (Egyptian hieroglyphs have been found in the basin area). Most maps have it below Nubia. Hieroglyphs mentioning the Kingdom of the Yam date from 2300 - 2100 BC I think. The lake Chad area certainly seems to have been involved with major powers. I wish there was more archeological studies about this area. Too bad it's unstable right now.
So the persians, the greeks and the romans tried to conquer Kush...but failed!
That said, the video was fantastic. I'm going to support his Patreon.