Display device for displaying a preview video based on past playback information

A display device comprising:

• a display;
• and
• a controller configured to:
• display a video list including at least one video item, with each of the at least one video item corresponding to a respective video,
• control the display to display a video item of the at least one video item in a thumbnail mode, with a first thumbnail representing a first preview video based on a first, last playback time of the video corresponding to the video item,
• in response to a first selection of the video item, switch from the thumbnail mode to a full screen mode and play the video of the video item in full screen on the display,
• in response to a command to stop playing video during playback of the video;
• change the first, last playback time of the video to a second, last playback time when the command to stop playing video is received, and
• change the first preview video to a second preview video and the first thumbnail to a second thumbnail based on the second, last playback time,
• play the second preview video at a position of the second thumbnail, and
• in response to a second selection of the video item while the second preview video is being played in the thumbnail mode, play the video in full screen from the second, last playback time.