The video in question tonight - play 22.20 on the same night. You can see how the lights of oncoming traffic from behind (round the curve) affects how the rear windows look in a stationary car stopped at the lights up front. I don't want to debunk anything, I just don't want to believe there's footage like that outstanding in the public domain.
https://livetrains.co.uk/jamCams/archive/00001.03901/vid/1614810047.mp4
The right car has similar stuff going on.