1. An operating method of a video display device including a tuner, a receiver and an enhanced service manager, the method comprising: receiving a broadcasting signal through the tuner; obtaining a promotion content included in an uncompressed audio or video (AV) content through the receiver; extracting, via the enhanced service manager, a characteristic information, including at least one of a watermark and a fingerprint, from the promotion content; transmitting, via the enhanced service manager, a first query to a first server, wherein the first query includes the characteristic information; receiving, via the enhanced service manager, a first response including at least one of a URL of a promotion application and a start time of a main content promoted by the promotion content from the first server, based on the transmitted first query, wherein the promotion application is used for setting a content reminder for the main content; transmitting, via the enhanced service manager, a second query to a second server based on the URL of the promotion application included in the first response; receiving, via the enhanced service manager, the promotion application from the second server, based on the transmitted second query; outputting, via the enhanced service manager, a first user interface for setting the content reminder via the promotion application, wherein the first user interface includes at least one of a name of the main content, a broadcasting date of the main content, or a menu for selecting an option to approve the content reminder setting; receiving, via the enhanced service manager, a content reminder message based on the content reminder, wherein the content reminder message includes a URL of a content reminder application; receiving, via the enhanced service manager, the content reminder application, based on the URL of the content reminder application; and outputting, via the enhanced service manager, information on the main content based on the content reminder message via the content reminder application, wherein the outputting the information on the main content comprises: outputting information on a specific channel among a plurality of channels concurrently broadcasting the main content and excluding channels provided by an unsubscribed multichannel video programming distributor (MVPD), and outputting a user interface for receiving a user input for changing to the outputted specific channel, wherein the specific channel is included in a service package which is provided by a subscribed MVPD.