Yes I watched it when i was pregnant and it was definitely sterngthened my decision in going natural. I already had a midwife anyway and was open to the idea of no-epidural birth but this movie made up my mind even more.
I would say though that I think a lot of what happens in the documantary is more common in the US, just more money driven industry than Canada. Here in Canada, or at least in Ottawa where I'm from, the hospitals do not have such high intervensions rates. The two main hospitals in Ottawa are very midwife friendly and the rate of C-section has dropped in the last few years.