It has to be said from the get-go that this is no proper documentary as it's circumstantial and somewhat manipulative (maybe even insufficiently documented for all I know). But while the case studies it brings about certainly have this feeling of tabloid garbage fed to the masses by the teaspoonful, what it all boils down to at the end of it all is that it manages to raise the question of whether or not snuff cinematography is more than an urban myth (again). The answer it seems to convey is a definitive yes and, knowing human nature as I do, I tend to agree.
Sadly though there's just too much beating about the bush. Snuff and mainstream cinematography ('Cannibal Holocaust')? Snuff and war footage? You're missing the point here and stretching the concept way past the rupture point.
That said, if you happen to have a chance to watch this and can put up with its violent content, do not hesitate. And I mean really, really violent 'Saw'-has-nothing-on-this kind of content.