A display device comprising: an input sensor unit configured to sense an input to the display device; a storage unit configured to store first video data containing refocusable frames, wherein each of the refocusable frames is a frame being refocusable using light field technique; a display unit configured to display visual information including the first video data; and a processor configured to control the input sensor unit, the storage unit and the display unit, wherein the processor is further configured to: when a first input for a first frame of the first video data and a second input for a second frame of the first video data are detected, refocus the first frame based on a position of the detected first input, and refocus the second frame based on a position of the detected second input, wherein the second input is a touch input connected to the first input, and the second frame is a frame arranged after the first frame, generate second video data using the first video data including the refocused first frame and the refocused second frame, characterized in that the processor is further configured to: detect a slide touch input connecting the first and second inputs and that the first video data is not played, select each frame in the first video data in a playing order in proportion to a length of the slide touch input; sequentially provide each of the selected frames as the length of the slide touch input extends; detect an expansion speed of the length of the slide touch input based on the quantity of the frames provided for a predetermined time; when the detected expansion speed exceeds a threshold speed, edit the first video data by deleting the quantity of the frames according to the expansion speed. an input sensor unit configured to sense an input to the display device; a storage unit configured to store first video data containing refocusable frames, wherein each of the refocusable frames is a frame being refocusable using light field technique; a display unit configured to display visual information including the first video data; and a processor configured to control the input sensor unit, the storage unit and the display unit, wherein the processor is further configured to: when a first input for a first frame of the first video data and a second input for a second frame of the first video data are detected, refocus the first frame based on a position of the detected first input, and refocus the second frame based on a position of the detected second input, wherein the second input is a touch input connected to the first input, and the second frame is a frame arranged after the first frame, generate second video data using the first video data including the refocused first frame and the refocused second frame, characterized in that the processor is further configured to: detect a slide touch input connecting the first and second inputs and that the first video data is not played, select each frame in the first video data in a playing order in proportion to a length of the slide touch input; sequentially provide each of the selected frames as the length of the slide touch input extends; detect an expansion speed of the length of the slide touch input based on the quantity of the frames provided for a predetermined time; when the detected expansion speed exceeds a threshold speed, edit the first video data by deleting the quantity of the frames according to the expansion speed. when a first input for a first frame of the first video data and a second input for a second frame of the first video data are detected, refocus the first frame based on a position of the detected first input, and refocus the second frame based on a position of the detected second input, wherein the second input is a touch input connected to the first input, and the second frame is a frame arranged after the first frame, generate second video data using the first video data including the refocused first frame and the refocused second frame, characterized in that the processor is further configured to: detect a slide touch input connecting the first and second inputs and that the first video data is not played, select each frame in the first video data in a playing order in proportion to a length of the slide touch input; sequentially provide each of the selected frames as the length of the slide touch input extends; detect an expansion speed of the length of the slide touch input based on the quantity of the frames provided for a predetermined time; when the detected expansion speed exceeds a threshold speed, edit the first video data by deleting the quantity of the frames according to the expansion speed. detect a slide touch input connecting the first and second inputs and that the first video data is not played, select each frame in the first video data in a playing order in proportion to a length of the slide touch input; sequentially provide each of the selected frames as the length of the slide touch input extends; detect an expansion speed of the length of the slide touch input based on the quantity of the frames provided for a predetermined time; when the detected expansion speed exceeds a threshold speed, edit the first video data by deleting the quantity of the frames according to the expansion speed.