The lady in black is doing a hairstyle tutorial and demonstrating on another woman who is seated next to her.  She shows the hairspray that she has used on the model.  She uses the hairspray on the model's hair and sprays it.  She then takes a pair of scissors and cuts the rubber band off and spray her hair again.  She pulls her braid apart and rubs her fingers over it.  She then twists the braid and pins it up on the model's head.  She twists it again and tightens it up and secures it with a pin again.  She also makes a bun out of the braid to complete the hairstyle.  She shows the hairspray bottle again that she has used on the model.