This is an amateur video of two girls tribbing with their clothes on at a club. Someone is filming them and watching them do this in public. They start out grinding in an open scissor position. Then the girl in the black pants rides the girl in the white pants. They also suck on each others boobs, the girl in the white has big ones.
Open Scissor: Start of the video, 27 seconds
Riding: 44 seconds, 1:36