Fight the New Drug have recently released three 30-minute films, Brain Heart World, about the impact of pornography on the brain, relationships, and society. The films are extremely well produced with first class graphics, expert interviews, and personal stories. They are free for private viewing, but only until the end of November, if you sign up online here. You can also buy the right to public viewings at $50. This would be a great option for youth groups or other small groups.
If you are addicted to porn you may want to have a look at Fortify (one of the film sponsors) a science-based online recovery tool to help individuals quit pornography.
None of these organizations have any Christian basis as far as I can see, but represent the growing social unease with porn even if only for health and relationship reasons. If used together with Christian counseling, pastoring, and support, the films and other resources could be useful both to prevent and deliver from porn. Just make sure to view the films in their entirety before a public showing to ensure that you can mute or edit any content that might offend your community. The content is quite raw and hard-hitting in places.