The video display apparatus and method of operation

The present invention relates to a video display device and its operation method. Method of operating a video display device according to an embodiment of the present invention, the step of displaying a thumbnail list including at least some of the steps of: generating a plurality of thumbnail images, the generated thumbnail image based on the input signal, the thumbnail list at least comprising the step of updating in a portion of the plurality of thumbnail images, and an update cycle of some thumbnail image in the thumbnail list is same with the update frequency of the other thumbnail images. As a result, it is possible the user to easily select the channel. Input signal, thumbnail, updates the period