To play a bit of follow-up, I actually went ahead and replied to the email from Zig Zag Productions. The response I received made me about as uncomfortable as the initial pitch, but it went far to clearing up my questions as to why
they're doing what they are.
In short, I've been assured that it's going to be something of an open soap-box documentary, letting otherkin speak out to the general community. Given my earlier reservations about the choice of media, the company, and the inherent need for profitability, I flag this as "a sincere production of dubious intent" that I would not advise participation in at this time.*
(Because I respect their contact representative's privacy, I won't be copy-pasting his follow-up email here. Despite email's open, insecure nature, that wouldn't be terribly fair of me.)
More interestingly: someone in the community (whom I follow on Twitter) is putting together their own documentary, as a grassroots thing with open submission and a more transparent editing process. Some of you had expressed interest in similar ideas in the comments of my previous post. Would you mind helping Arudem out?http://arudem.tumblr.com/post/17988887733/an-otherkin-documentary
---* As a note of interest, one of the ideas discussed with me was a segment about bringing otherkin from the UK to meet their US counterparts. Certain people in my audience will find this very amusing indeed. In the interests of being coy and protecting the innocent, I'll simply state that I've done this at least twice now.