In the video, a person is seen working on a roof. The person is using a tool to apply a substance to the roof. The tool is being moved back and forth over the roof, and the substance is being applied to the surface. The person is wearing gloves and is working carefully to ensure that the substance is applied evenly. The roof appears to be made of shingles, and the substance being applied is likely a sealant or adhesive. The person is moving the tool with precision, and the substance is being applied in a straight line. The video provides a close-up view of the work being done, allowing the viewer to see the details of the process.