Sorry, this test is bullshit.
In this video, the rolling shuter is composed of 4 components that add together:
1. The A7S rolling shutter (duh)
2. The raster scan display (equal to ~1/24 or 1/30 s for the 4K monitor)
3. The unknown rolling shutter speed of the camera filming the monitor
4. The raster scan display you are watching (e.g. 1/60 s, with rare exceptions like Lightboost)
explanation for display skew:
The rolling shutter of the A7S might still be the dominant factor, but I'd wait and see for some real tests.
