The video shows a series of images of a CT scan of a person's chest. The images are in black and white and show the bones and organs inside the chest. The video zooms in on a specific area of the scan, highlighting it with a yellow line and measurements. The measurements are displayed in millimeters, indicating the size of the area being highlighted. The video provides a detailed view of the internal structures of the chest, including the rib cage, spine, and lungs.