If you watch both videos, you'll find they are the same - the one labelled Fred and Ginger is a copy of the Fred and Eleanor version - perhaps a couple of (copy) generations later, which accounts for its generally-blurred appearance.
You'll also notice the stage settings and camera angles are identical - even to reflections seen in an on-stage mirror.
Here's a still from both videos, captured at the same point in the routine ...
Morse code or teletype?