What is the purpose of showing these videos? Are you trying to show all religious belief in a negative light? Are you trying to find correlations to JW mindset?
I think "September Dawn" is interesting as a comparison to JW's..."Jesus Camp" is a bit on the fringe since it does not reflect mainstream evangelicals...kind of like saying Westboro Baptist Church is representative of Christianity.
I loved Robert Duvall in "The Apostle"...a great study of the struggle with faith and human weakness. A couple of other interesting movies that an ex-JW could relate to are "The Truman Show", "The Crucible", animated version of "Animal Farm", "Elmer Gantry"...to name a few. I realize these are more entertainment than documentary, but they definitely touch on how high control can affect thinking.