8: The Mormon Proposition (2010)

Filmmaker and ex-Church of Jesus Christ of Latter-day Saints member Reed Cowan examines that church's nationwide efforts to prevent the legalization of gay marriage - including California's Proposition 8, which was passed by voters in 2008. Confidential church documents, statements by high-ranking church officials and other sources detail 30 years of efforts to turn back gay rights, particularly by the Mormon-sponsored National Organization for Marriage.

Unfortunately the movie 8: The Mormon Proposition is not yet available on HBO Max.