This was a really poor class. The Professor seemed not to have any research into the topic himself, so approaches it from his personal background, which is as a nuclear scientist. So, don't really expect any insight into other technologies, and no theoretical discussion at all of ethical systems etc.
As far as difficulty goes, its very easy. I listened to most of the lectures on 1.75 speed, as there is so little content, you could easily take in the lecture at this speed.