Display apparatus, server, system and information-providing methods thereof

A method of controlling an electronic apparatus, comprising:

• extracting, by a processor, video features of frames from a plurality of frames of video content;
• extracting, by the processor, text features from transcript information comprising text of the video content, the transcript information being provided separately from the video content;
• identifying, by the processor, importance scores of the frames based on the video features and the text features;
• selecting, by the processor, at least one key frame of the video content among the plurality of frames based on the identified importance scores;
• and
• producing a video summary with the selected at least one key frame,
• wherein the identifying of the importance scores comprises predicting the importance scores of the frames corresponding to association with the text features using a model learned by performing machine leaning, and
• wherein the selecting of the at least one key frame comprises selecting the at least one key frame to produce the video summary based on the predicted importance scores corresponding to association with the text features, the produced video summary being semantically coherent with respect to the transcript information.