I need to get back to this documentary but Mr TheOne, I was checking out something about Afro-Iranians yesterday and I suspect your video will add more substance or facts to the article:
In your spare time google: "A Brief History of the Black Iranian," by Jeffrey Kass. [6.26]

A very simple take and a brief one but from my perspective underlines the usual assumptions that Black folks are in the area either from the slave trade or earlier on from the early sea trade routes etc etc.
Some folks can't process that Africans were in that area long before the Arab or Persian influence or presence. It's pretty much like the denial of the African roots of Kemetic Egypt etc.