ImperialChaos
President
There's a view of Kabul on the trade route list (0:41) , showing as being a Zulu city, but I can't see a reason the Zulus would have that as their city from the start. Possibly a hint at a new civ, maybe the Timurids or something?
Kabul is a city-state. It was most likely annexed by the Zulu.
As for the video: it was a pretty good view of the trade route system. I just wished they revealed the final two civilizations and got it over with.