That generous PattiforPM has unearthed a clip of Legs & Co.'s transparent screen routine, to John Lennon's (Just Like) Starting Over: it's a big improvement on the version I previously posted, which the Holy Copyright Inquisition have had blocked anyway.
What's the point of those screens anyway? I don't see any figurative connection with the song at all. Unless they're there to mask the wires on the robes, I suppose. Hey, I've just spotted a classic bit of literal choreography ay 0:41. Fly away!
Many thanks to PattiforPM for the clip.