Another very informative film

I found this on You-Tube as well.  Although fairly brief, I find it to be very informative with regard to photographic history.  Another interesting film from the BBC, I wish the US networks had the same interest in these art documentaies.  Very well done, take a quick look and see what you think. There are 6 parts posted to You Tube.  Here is the link to part 1- http://www.youtube.com/watch?v=Ut00KGEwYL0