Crimean Lord
Warlord
Also, the vassal glitch seen in the video is purely visual. If you have chipotle enabled and press Ctrl+Z you will see that you're not shown as a vassal there but rather some other nation you've not met. I'm not sure why this happens and have yet to reproduce it, I am very sorry for the confusion.
About Vassal's Issue
In the introduction I said to audience (in russain) that main goal "simulate" all Russian History (from Horde on the one hand and to Putin on the other hand)
and I will use WB sometimes for minor pro-historical changes etc
As a result in the first turn - I actvated Russia as vassal state))