1. An interesting section identification device that identifies an interesting section in a video that is estimated to interest a user, the interesting section identification device comprising: an object detection unit configured to detect an object included in a frame extracted from the video; motion feature value extraction unit configured to calculate a motion feature value of the object in the frame; a distinctiveness calculation unit configured to calculate a degree of distinctiveness in terms of motion of the object with respect to the frame, with use of the calculated motion feature value of the object in the frame; and an interesting section identification unit configured to identify the interesting section in the video, with use of the calculated degree of distinctiveness, wherein the object detection unit detects the object from each of a plurality of frames extracted from the video, the motion feature value extraction unit calculates a motion feature value of the object in each of the frames, with respect to each of the frames that is a target frame, the distinctiveness calculation unit calculates a degree of distinctiveness of the motion feature value of the object in the target frame from the respective motion feature values of the object in all other of the frames, and the distinctiveness calculation unit calculates the degree of distinctiveness of the motion feature value of the object in the target frame, based on an inner product of the motion feature value of the object in the target frame and an average of the respective motion feature values of the object in all other of the frames.