When someone submitted this from Youtube, my first reaction was "you've got to be kidding me", never-the-less this seems to be a well researched and educating documentary on the history of the toilet.
In The Toilet - An Unspoken History Welsh poet Ifor Ap Glyn takes us on a journey around the world exploring the cultural, technological and social impact of the toilet. Starting in Spain, Everyman travels to China, Japan the UK and various other countries investigating ancient toilets and some bizarre modern ones. in the film, he reinforces the idea that they are a significant aspect of our societies.