In the video, a person is using a red and black electric sander to smooth out the surface of a wooden board. The sander has a yellow knob on the side, which the person turns to adjust the machine's settings. The wooden board is placed on a workbench, and the person moves the sander back and forth over the board's surface to remove any rough spots or imperfections. The video provides a close-up view of the sander and the board, allowing the viewer to see the details of the sanding process.