It is the redneck influence again. This is obviously not your ordinary restroom. It may be too clever to be labeled redneck, but it is definitely out of the ordinary.
It is a very clever and totally original idea for a video, although it must have cost a few dollars to set it up. To have back to back rest rooms with glass in place of the mirror alone must have cost a bit. You could only do this in Europe because multi-gender restrooms would not go over well in the US.
The woman in grey does not really look that much like her “reflection” on the other side of the glass, but people obviously do not notice that. There are getting to be some very clever videos out there, and I believe that they will only get better as more people start trying to do them.