Unfortunately only saw part 3 and 4 of that documentary on TV but It was very interesting, giving a great view of European and American cinema of those times. I particularly liked the way it was constructed. The evolution of cinema through historical human events, followed through the eyes of two witnesses, a woman expatriated in Hollywood and a man living in Paris.
It brought up different themes, among others... how American cinema has invaded (for the better and the worse) our screens, the censorship that started in Germany in the 30s, how politics and cinema can get along well sometimes, how actors were building their careers, the great creators like Renoir, Duvivier and Carne... among others...
Many US/French "classics" that after seeing the documentary you want to discover or re-see... May I recommend this documentary ?... Yes, my pleasure !