The comments on her video are quite vile if you know certain dogwhistle expressions which I unfortunately do.
Is she an unusual leader figure? Sure, but the same goes for Ben Franklin, Confucius, Machiavelli and most remarkably Ibn Battuta, none of whom have ever ruled a nation or even a military unit. I'm not sure I would be that open for non-leader leaders if I were dev, but its Firaxis artistic choice so to speak, and they do admittedly pick very interesting figures to serve as unorthodox leaders.
And yet, strangely enough, none of these have caused significant controversy in the youtube comments - even Ibn Battuta who was merely an explorer. Strangely enough it's always with black people, or women, or LGBT people, that suddenly legions of critics crawl out from their crevices, who suddenly are extremely passionate about 'historicity', 'realism', or any rationalised grounds on which existence of, say, black women, is unwarranted in any particular case.
When a white guy becomes shogun in the popular TV series nobody bats an eye, but when a black guy becomes shogun in the popular game series suddenly everybody is a passionate historian first, fan of cool action second. Give me a break. What's the most pathetic here is the cowardice - just admit that you don't like black people, don't use those nonsensical double standards that emerge in their sharpness only when black people enter the cultural scene.
Worst part is, whenever there is a genuinely terrible media production employing diversity (say, Forspoken video game with black woman protagonist), I know when I laugh at it I am in the same crowd as those despicable people, who never like any black women anywhere, no matter the quality of a given work. So how do you discern those from sane critics? My rule of thumb is to distrust those who are emotional in such discourse, who are genuinely seething with contempt, who are cackling viciously and with ill intentions, not just you know... criticize.