Abstract: A method of playing a video by a content server according to the present disclosure includes: selecting a music to be played according to a user input; reading information on channels and segments of the selected music to be played; Mapping video segments corresponding to at least one of each channel and each segment to the music to be playing on the basis of the information about channels of the music to be played and segments, and playing the video segments mapped to the music to be played so that the video can be played by each segment of the music.