13. A comment-provided video generating method comprising: The generating superimposing method determining method according to claim 12 ; generating the comment-provided video by composing the comment regions in the video according to the comment superimposing method determined in the determining; and outputting the comment-provided video generated in the generating, wherein, in the comment-provided video output in the outputting, either (i) a first pair of the first subject region and the second comment region which includes the comment provided to the first subject region or (ii) a second pair of the first comment region and the second subject region which is provided with the comment included in the first comment region is superimposed and displayed on the other comment regions and the other subject regions, the first subject region and the first comment region corresponding to a user-selected region located at the specified position indicated by the user information.
13. A comment-provided video generating method comprising: The generating superimposing method determining method according to claim 12 ; generating the comment-provided video by composing the comment regions in the video according to the comment superimposing method determined in the determining; and outputting the comment-provided video generated in the generating, wherein, in the comment-provided video output in the outputting, either (i) a first pair of the first subject region and the second comment region which includes the comment provided to the first subject region or (ii) a second pair of the first comment region and the second subject region which is provided with the comment included in the first comment region is superimposed and displayed on the other comment regions and the other subject regions, the first subject region and the first comment region corresponding to a user-selected region located at the specified position indicated by the user information. 14. The comment-provided video generating method according to claim 13 , wherein the association information further indicates subject information of subjects to which the plurality of comments are provided.