Here's a detailed description of the video: A person wearing a black tank top, black pants, and black Adidas shoes is performing lateral raises with dumbbells in a gym. They are standing on a black platform with a red and black structure behind them, likely part of the gym equipment. The person has headphones on. The gym has mirrors lining the wall behind the person, reflecting various other gym-goers and equipment. There are rows of dumbbells, weight machines, and other exercise apparatus visible. The lighting is bright, with rectangular ceiling lights providing illumination. Other people are exercising in the background. The video captures the person from the back as they lift the dumbbells out to the sides, working their shoulder muscles.