Aut cum scuto aut in scuto
From the rock so.ud centering of the plane against a jumpy background, I’m pretty sure that’s a 1920s split screen photo shop. I hope so for the young lady’s sake.
I'm sure it is too, but still....
It's from the first Rogers/Astaire film, "Flying down to Rio."
Rear projection, when the double trapeze swings in you can see the plane shift on the wires, then shimmy after she is dropped to the net below.