1. A video search system comprising: a search engine configured to extract video data matching a search condition from an original video; and a browsing engine configured to: generate a summarized video based on the extracted video data, render, in real time, a plurality of objects over a background model in the summarized video in an overlapping manner according to a temporal order of appearance of the plurality of objects in the original video, display the plurality of rendered objects over the background model, the temporal order of appearance of the plurality of objects in the original video corresponding to a displaying order of the plurality of rendered objects in the summarized video, and, in response to a video change request, display a plurality of summarized video layers in the overlapping manner based on at least one of a time basis and a category basis, the background model corresponding to a lowest layer of the plurality of summarized video layers.