Why is ppt overexposed during recording?

The video file itself takes up a lot of space. The video file itself takes up a lot of space, and the PPT will be bigger after the video, so it will be overexposed. Overexposure refers to the overexposure in which white remains in the brightness area of the photographic picture without details of the picture. In photographic subjects, the exposure control of high-light areas is a key index to measure the photographer's level.