In the video, a person is seen pouring a dark liquid onto a green slime that is sitting on a white surface. The person then begins to mix the liquid into the slime using their hands. The slime appears to be thick and gooey, and the dark liquid is being mixed in until it is evenly distributed throughout the slime. The person's hands are visible as they work the liquid into the slime, and the white surface provides a stark contrast to the green color of the slime.