A video call mediation method of a system may include receiving, by a server, a mediation request, from a plurality of mobiles, mediating, by the server, a first mobile and a second mobile, of the plurality of mobiles, establishing, by the first mobile and the second mobile, a video call session, receiving, by the first mobile, a video, from the second mobile, through the video call session, detecting, by the first mobile, a certain input, reporting, by the first mobile, a video received in the server, in response to the certain input, ending, by the first mobile, the video call session with the second mobile, and establishing, by the first mobile, a video call session with a third mobile, and verifying, by the server, the reporting, and rejecting, by the server, additional mediation request of the second mobile.