In the context of an MP4 video file, "" typically refers to the Exposure Value (EV) metadata or camera setting used during recording . It indicates that the video was shot with standard, balanced exposure as determined by the camera's internal light meter. What "0 Ev" Means for Your Video
: The video is intentionally underexposed to appear darker.
: A setting of 0.0 EV means the camera automatically balanced its settings (ISO, aperture, and shutter speed) to capture a scene that is neither intentionally darkened nor brightened.
: The video is intentionally overexposed to appear brighter.