That is a VERY nice documentary. I have seen and read his paper, too!
I think some people are disappointed because of the poor camera skills and video quality. But it has been explained that this research group was truly roughing it, they were way out there, to get some good information out in the natural habitat of those snakes. They didn't have the people nor equipment to turn this into a film-quality video, but when it comes to authenticity of the snakes in their natural habitat (not living on bushes and trees on the outskirts of human habitation, following where the rodents congregate) this is a most interesting documentary.