The video shows a close-up of a welding machine in action. The machine is being used to weld two pieces of metal together. The metal is being heated to a high temperature, causing it to glow red hot. The welding machine is then used to apply a weld to the metal, creating a strong bond between the two pieces. The weld is visible as a bright, glowing line where the metal has been fused together. The machine is operated by a person who is not visible in the video. The background is dark, and the focus is on the welding process.