Video display device and control method thereof

A method of controlling a video display device, the method comprising:

• obtaining an uncompressed audio-visual (AV) content;
• extracting first information for identifying the uncompressed AV content being viewed, from a content section of the uncompressed AV content, wherein the first information is one of a watermark and a fingerprint;
• transmitting a first query including the first information to a first server;
• obtaining an address of a second server on the basis of a first response for the first query from the first server;
• transmitting a second query to the second server by using the address of the second server;
• obtaining a second information on the basis of a second response for the second query from the second server,
• wherein the second information includes a start time of an application;
• and
• executing the application in the start time of the application.