In the present invention: in a first part, a video within a virtual space is displayed, where a plurality of types of objects are arranged, including a character object that operates on the basis of first data shared by a plurality of computers; and in a second part, a video is displayed which contains a character object on the basis of second data. The second data: includes information for causing the character object to speak a voice; is sent from an external source to one or more arbitrary computers including a first computer to be used by a first user; and has different spoken information from data that is sent to a second computer used by a second user. A specific object that is displayed in the first part can change its display mode, and the display mode of a specific object that is displayed in the second part is the display mode to be changed in the first part.