One thing I will say, is that when they draw their swords, the edge should be pointing up. That's how katanas were, and are carried. Just a little thing I noticed, not a big deal.
This could be explained away by saying the game is set somewhere from the 10th to the 13th century. The earlier stages predate the invention of the katana and even through the late 13th century, the tachi was more common. That's important because those were usually worn up the other way.
Also that video is amazing, great work!