Writers knowingly use “African” to imply images of “black” Africans, when what the world knew and understood most about Africa 2,000 years ago, was North Africa, which was Carthaginian, Egyptian, Greek-Egytian, Berber, Arab and a minority of “blacks” up from Chad and places just south of the Sahara. That was most of Africa to the world of the ages of the Greek and Roman empires.
Severus was part Roman and part Carthaginian, and not representative of what readers today would equate with “African”, though from North Africa he was.
I agree, that is often true. The comments section at the vid has those kinds of comments (in agreement) but also the correction of sorts by a local.