A video review is a process in which a recorded video is carefully analyzed and assessed. This can be done for various purposes such as to verify an event, to check accuracy or to evaluate performance. In sports, it's commonly used by referees to make decisions on goals, penalties or other incidents that they may have missed during the game. It is also widely used in surveillance systems and security cameras for monitoring purposes. The video review can be done manually where a person watches the recording frame-by-frame or automatically using advanced technology such as computer algorithms to detect specific patterns, movements or changes within the footage.