An online video distribution support method is performed by a system including one or more computers connected to communicate with viewer terminals. The method includes: acquiring a viewer image from each of the viewer terminals; displaying a screen including viewer images; detecting, using a captured image of a distributor, a line-of-sight direction of the distributor; determining, based on the line-of-sight direction, a viewer corresponding to a viewer image on the screen toward which a line-of-sight of the distributor is directed, and determining priorities of the viewer images to be displayed on the screen; and generating an updated screen using the priorities to switch the viewer images on the screen, and displaying the updated screen.