Not really. It's one of those commercials with the player as the avatar. There is also a white Mongol in the commercial as well. And at the end of the trailer, an actress tells you to make your own history. The in-game units are still proper Mongols.

There is a reason they showed a still frame and not the whole trailer. Watch the trailer

https://youtu.be/CZx9XHdD5m4?si=q0PvhmQ4EyVp3Jt4

It isn't a black mongol commercial. They are fighting for Pudding Town.

Not really. It's one of those commercials with the player as the avatar. The in-game units are still proper Mongols.