This porn video tag means that the scene involves touching various parts of a person's body. "Touch the body" refers to the act of physically caressing, stroking or gently rubbing different areas such as the arms, legs, chest, stomach, back, and so on. "HD" stands for High Definition, which means the video is shot in high resolution providing clear and detailed visuals. This tag is used to describe a scene that emphasizes sensual touching while maintaining superior image quality.