1. An appearing-object estimating apparatus for estimating an appearing-object or objects appearing in a recorded video, said appearing-object estimating apparatus comprising: a data obtaining device for obtaining statistical data corresponding to an appearing-object or objects whose appearances are identified in advance in one unit video out of a plurality of unit videos into which the video is divided in accordance with predetermined types of criteria, out of the appearing-object or objects, from among a database including a plurality of statistical data, each having statistical properties as for the appearing-object or objects set in advance as for predetermined types of items; and an estimating device for estimating the appearing-object or objects in the one unit video or in another unit video before or after the one unit video out of the plurality of unit videos, on the basis of the obtained statistical data.