The Church released a redone version of Joseph Smith: Prophet of the Restoration, a film that is shown in some of the temple visitor centers around the world, as well as in other places. About 40% of the film is new material, with the overall length 5 minutes shorter than the previous film. You can watch the film online. It is a great introduction to the prophet Joseph Smith and the restoration of the Church of Jesus Christ. The film can serve as a great missionary tool as well as a great tool to learn more about church history. You can still see the other version of the film in visitor centers and it is available in the Doctrine and Covenants DVD set but the new one, which is just as good as the old version (and clearer for people who are not church members), can be watched online. I’ve embedded the film here.