Factual error: After a new camera man is hired, Wagner, the camera man starts showing off to his fellow crew members that he invented "slow motion". In the next scene he demonstrates this by spinning the handle of the camera slowly. In fact this is not right, when the movie is projected the movie will be speeded up instead of slowed down.
Factual error: When departing, the producer remarks to the assembled press that F.W. Murnau is one of the greatest directors, comparable to D.W. Griffith or Sergei Eisenstein. Nosferatu was filmed in 1921, Eisenstein's first film came out in 1923 and he wasn't renowned until 1925.