| http://www.w3.org/ns/prov#value | - Referring to FIG. 2, the video server 1 comprises a video database 3 which manages the video programs; a control unit 4 which sends a video program for a user to view upon request and controls the operations such as write, transmission, and reading of the required information; and a buffer 5 which transmits a video stream or video highlight to the user terminal 2, under the control of the control
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