The video shows a person's hand using a metal tool to measure and mark a piece of wood. The tool appears to be a combination square, which is used to draw straight lines and measure angles. The person is seen adjusting the tool to the desired angle and then using it to draw a line on the wood. The wood is light-colored and appears to be plywood or a similar material. The background is a workbench with several holes, suggesting that the person is in a workshop or woodworking area.