My version:

Reference images:

Analysis (whoo, scientific): Yeah, I even do the extras' hairstyles, in this case, the lady front and center. The hair looks like it's parted a bit in front, though not in the back. The hair is twisted on the sides, leading into an unusual-looking bun made up of several twists.

Directions: Part the first few inches of your hair. Separate the hair into two sections, but don't let the part extend all the way down the back of your head. Rope-braid the sides, taking hair from only the side closest to the head and using big chunks of hair. Where the two rope braids meet in the back, twist them together and loop them around each other a few times so that it looks (somewhat) like the pictures. It's hard to see exactly what they did, but this gave a look that was at least a little bit similar.