The video is apparently pretty old but I’ve just come across it myself. If you play the video be prepared to watch a hip philosopher talk about the structure of toilets in America, France and Germany and how this structure relates to their respective ideologies. I think Žižek is making a false assumption in this claim. It isn’t that we see evidence of American, French and German ideologies by looking at their toilets – it is that we finally have evidence pointing to toilet engineers as the most influential thinkers of our time. The ideologies are not found in the toilet, the toilet creates the ideologies.