In the video, a person is seen holding a black helmet and demonstrating how to adjust the chin strap. The person's hands are visible, and they are wearing a ring on their left hand. The helmet has a black exterior with a textured pattern and a yellow sticker on the top right corner. The chin strap is black with a silver buckle. The person adjusts the strap by pulling it tight and then loosening it slightly. They also show how to adjust the strap by pulling it from the side and then from the front. The person's movements are deliberate and clear, making it easy to understand how to adjust the chin strap on the helmet.