For starters there are four original trailers for some of the exploitation movies featured in the documentary itself. (scifimoviepage.com)
That's one of the coolest and most original trailers I've ever seen. (firstshowing.net)
More context is given in original trailer, released in June, in which Ross explains that outsiders view Wakanda as a Third World country, only to be told by Klaue that the «textiles, shepherds, cool outfits» are nothing more than «a front.» (cbr.com)