An advertisement distribution system executes a first step in which a server requests that a distributor client submit advertisements, a second step in which the advertisements submitted by the distributor client are provided to an advertiser client according to the request, a third step in which the advertisement that is employed from among the provided advertisements is received by the advertiser client, and the server is notified by the advertiser client, a fourth step in which a video is received from the distributor client by the server, and a fifth step in which the server distributes the video received from the distributor client, and provides the employed advertisement at a specific timing in the distribution of the video.