Provided is a server device capable of further promoting provision of videos. A center server stores video data to be distributed to user terminals connected via a network and distributes video data in response to a request from a user terminal. The center server also manages the video data so that a user ID and a video ID are associated and recorded and, when an additional condition including the viewing of individual videos as a requirement is satisfied, uses the video data as a basis to specify a first user corresponding via user ID to a video viewed through a user terminal in order to satisfy the additional requirement. Furthermore, when a user terminal additionally functions as a game terminal for providing a game, the center server provides additional information to the first user for adding a game change to the game.