The video shows a person using a red tool to tighten the strings of a guitar. The guitar has a red and black body, and the person is using the tool to adjust the strings on the head of the guitar. The person's hands are visible, and they are wearing a white shirt. The background is a white surface, and there is a wooden block under the guitar. The person is using the tool to make precise adjustments to the strings, ensuring that they are properly tuned.