I did not watch the whole thing. Whatever video camera used to film it was horrible, they need to fix that. it was changing apertures and the video kept getting bright and dark. This is the first hint that someone does not know what they are doing. After the flickering video, I lost interest.
I would be interested in a serious comparison at every focal length at 24mm, 35mm,50mm, 85mm, and 100mm. Wait, the RX100 does not do 85mm or 100mm, the most common portrait focal lengths. I settled on a G1X, so a G7X is not in my future in any event.