The video shows the construction of the Salt Lake City Temple by members of The Church of Jesus Christ of Latter-day Saints (inadvertently called by friends of other faiths, The Mormon Church) The film portrays the struggles that Latter-day Saints had to go through in order to build it. In the end they were able to succeed. The film also discusses the purpose of Mormon temples which is to seal families together in an eternal relationship.
mormon.org
lds.net