It is chilling.
Also, listen to the witnesses on that tape mention the same issues that have been debated here on FR - notably the connection between LDS and FLDS.
You can watch another outstanding video on Mormonism and polygamy HERE. You should be warned: it is about 90 minutes long and you will need to have a box of tissues handy before you get to the end.
Matthew 7:15 - 20 "Watch out for false prophets. They come to you in sheep's clothing, but inwardly they are ferocious wolves. By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? Likewise every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Thus, by their fruit you will recognize them.
The fLDS are practicing the pure Smithian religion as that one fabricated it to be and showed with his thirty plus wives, many of whom were still married to living men when Smith 'took them for his'.
I just ordered the video from Barnes & Noble. Thanks for the link. The Trailer was compelling, but you can get the video for about 1/2 the cost from Barnes & Noble.