Provided is a server device that when, during viewing of a video, viewing conditions for changing states of displayed objects included in the video are changed according to selection by the user, is capable of suppressing display of comments that do not match the viewing conditions of the video. A center server delivers, to a user terminal, replay data for displaying a replay video of which viewing conditions are changed during viewing in accordance with the selection by each user. The center server has a storage unit storing comment data including information about a stamp attached to the replay video and information about the viewing condition under which the replay video should be displayed. The center server, when delivering the replay data, provides the user terminal with the comment data so that the stamp displayed in the replay video is changed in accordance with change of the viewing condition.