An information processing device comprising: a video displaying section configured to display video content in a video display region on a screen; a comment acquiring section configured to acquire a comment related to the video content; and a comment displaying section configured to scroll a comment acquired by the comment acquiring section on the screen currently displaying the video content, wherein the comment displaying section is configured to display a comment when a position of the comment does not overlap with the video display region and to hide from view a comment when a position of the comment overlaps with the video display region, and the comment displaying section is configured to determine a speed at which comments held in a comment holding section are to be scrolled and to set a speed for scrolling a comment higher as a display size of the comment gets larger and to delay, if a comment is scrolled at a speed higher than a speed of a preceding comment, starting to scroll the ensuing comment so that the ensuing comment will not overlap the preceding comment in the course of the scrolling, wherein the screen is divided into a plurality of lanes and the comment displaying section is configured to scroll a comment in one of the plurality of lanes, the lanes include a first lane not overlapping with the video display region and a second lane partially overlapping with the video display region, and the comment displaying section is configured to determine whether an undisplayed comment held in the comment holding section is to be displayed immediately in the first lane in view of the scroll speed for the undisplayed comment and further is configured to select the first lane as a lane in which to scroll comments, and to additionally select the second lane if an amount of comments acquired by the comment acquiring section is equal to or higher than a predetermined amount. a video displaying section configured to display video content in a video display region on a screen; a comment acquiring section configured to acquire a comment related to the video content; and a comment displaying section configured to scroll a comment acquired by the comment acquiring section on the screen currently displaying the video content, wherein the comment displaying section is configured to display a comment when a position of the comment does not overlap with the video display region and to hide from view a comment when a position of the comment overlaps with the video display region, and the comment displaying section is configured to determine a speed at which comments held in a comment holding section are to be scrolled and to set a speed for scrolling a comment higher as a display size of the comment gets larger and to delay, if a comment is scrolled at a speed higher than a speed of a preceding comment, starting to scroll the ensuing comment so that the ensuing comment will not overlap the preceding comment in the course of the scrolling, wherein the screen is divided into a plurality of lanes and the comment displaying section is configured to scroll a comment in one of the plurality of lanes, the lanes include a first lane not overlapping with the video display region and a second lane partially overlapping with the video display region, and the comment displaying section is configured to determine whether an undisplayed comment held in the comment holding section is to be displayed immediately in the first lane in view of the scroll speed for the undisplayed comment and further is configured to select the first lane as a lane in which to scroll comments, and to additionally select the second lane if an amount of comments acquired by the comment acquiring section is equal to or higher than a predetermined amount.