In the video, a person is seen holding a green plastic bottle with a green string attached to it. The person is hanging the bottle on a tree branch. The bottle is filled with a liquid, and the string is tied to the branch, securing the bottle in place. The person then pulls the string upwards, causing the liquid to flow out of the bottle. The video captures the process of hanging the bottle and filling it with liquid, showcasing the simplicity and effectiveness of this method.