The girl is attacked by another girl while she is surrounded by dozens of people that do nothing. In the footage, you can see that at 01:03 minutes the aggressive girl is handed pepper spray. Pepper spray is illegal by law in The Netherlands, but it is very easy for people to get their hands on Pepper spray via the German market.
The aggressive girl had kicked the girl various times in her face and the people around her yelled that she should continue hitting the girl.
Resources claim that the mother of the aggressive girl ordered her to kick the girl in the face.