An online video distribution support method is executed by a computer that is communicably connected to a plurality of viewer terminals respectively used by an N number of viewers (N is an integer equal to or larger than 2) who view an online video. The online video distribution support method includes acquiring viewer information during distribution of the online video; calculating an index indicating a viewing situation of the viewers during the distribution of the online video based on the acquired viewer information; and selecting an M number of viewers (M is an integer satisfying 1≤M