1. A video surveillance system comprising: a plurality of cameras which acquire videos in a surveillance area; a recognition circuitry which detects an object from the videos acquired by the plurality of cameras and acquires a camera evaluation item that defines a relationship of the object relative to each camera; a priority degree setting circuitry which decides a degree of priority of the camera evaluation item; and video selection circuitry which: calculates an evaluation value quantifying the relationship of the object relative to each camera, prioritizes each video of the plurality of videos for display at a display according to the degree of priority of the camera evaluation item and the evaluation value, in the case where the object is detected in the surveillance area from videos acquired by two or more of the plurality of cameras, selects a selected video suitable for recognition processing of the object based on the degree of priority of the camera evaluation item and the evaluation value, superimposes a detection frame about the object on the selected video suitable for recognition processing of the object to be displayed on the display, and outputs the selected video suitable for recognition processing of the object to the recognition circuitry; wherein the recognition circuitry defines a suitable area for recognition of the object in the selected video.