Video display device and control method thereof

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

• displaying an automatic content recognition (ACR) function setting user interface (UI) through a display unit;
• receiving ACR function setting information according to an input of a user based on the ACR function setting UI;
• storing the ACR function setting information on a storage unit;
• receiving a broadcasting signal through a tuner;
• obtaining an uncompressed audio-visual (AV) content through a receiving unit;
• displaying the uncompressed AV content through the display unit;
• extracting characteristic information from a content section of the uncompressed AV content;
• transmitting a first query including the characteristic information to a first server;
• obtaining an address of a second server based on the first query;
• transmitting a second query to the second server;
• obtaining a start time of an enhanced service based on the second query;
• and
• displaying the enhanced service based on the start time through the display unit.