That is actually a Sikorsky S-56 (CH-37) blade, and it is being flown directly over the Sikorsky main plant in Stratford Connecticut, USA. The blade is a typical aluminum spar blade of that period, but its motions are quite similar to those of a modern blade. When I started at the Sikorsky test pilot's office in 1974, that film was being used in the training school and shown to all.
I don't think anyone ever quit because of it, frankly, we are all beyond such rational decisions, aren't we??