I don't know if this is accessible where you are. Haven't seen it yet, but it looks interesting. SBS is a TV station in Australia which shows a lot of programs from non-english speaking countries, plus documentaries which give insight into other cultures.
Insight: Polygamy TV & Video
It may be outlawed, but polygamy is practiced right here in Australia. In some indigenous, Muslim and African communities, having more than one wife is a long-standing and legitimate cultural norm. Is polygamy more natural for humans than traditional monogamy? And does it matter if some people are fully consenting to these arrangements?
Australian current affairs forum program, presented by Jenny Brockie. (An SBS Production) CC
CHANNEL: SBS ONE
BROADCAST: Wednesday 3, December 2014 8.30pm
CLOSED CAPTION: CC
WEBSITE: Insight: Polygamy