In the video, a man is standing in a river holding a rock. He is wearing a blue and black wetsuit and a snorkel mask on his head. The man is speaking to the camera and appears to be demonstrating how to clean the rock. He uses his hands to scrub the rock, and then he holds it up to the camera to show the difference between the cleaned and uncleaned sides. The river is flowing behind him, and there are trees and bushes visible in the background.