video shows a Short S.21 Maia flying boat with a Short S.20 Mercury riding on top of it (piggy-back or pick-a-back). It is the result of a Short Mayo Composite project.
It is an excerpt from Pathe News Digest (1938, No. 4). The segment is titled, "Pick A Back Carrier Plane".
The original video was silent; I've added some projector sound.
