In the video, a person is seen using a tool to apply a black material to the edge of a white object. The person's hands are visible, and they are carefully smoothing the material onto the object's edge. The tool used appears to be a small brush or applicator, and the black material is being applied in a precise and controlled manner. The person's movements are deliberate and steady, indicating a high level of skill and attention to detail. The white object being worked on has a smooth surface, and the black material is being applied to create a clean, sharp edge. The video provides a close-up view of the process, allowing viewers to see the texture of the materials and the technique used.