Well I have a black belt in Shotokan, which is quite similar to TSD. In TSD, second degree black is instructor level, just like it is in Shotokan. These women were one step away from that ranking.
These women were one step away from that ranking in their club under their instructor.
In some TSD clubs, 1st Dan is instructor, in others I've seen you have to wait until 3rd. All up to the instructors really. One video proves nothing.