A portable electronic device according to the present disclosure may include a memory configured to store video data, a touch screen configured to receive a touch input related to a summary of the video data, and a controller configured to generate the summary of the video data in response to the touch input, wherein the controller extracts objects included in the video data, and detects a section in which at least one of the extracted objects appears and then disappears, and edits the video data based on the detected section to generate a summary of the video data.