Panasonic Lumix GH5S vs GH5 vs G9 vs G85 – Video autofocus test

Richard writes:

This is a continuous / unedited 5 minutes+ video autofocus test: Panasonic GH5S vs GH5 vs G9 vs G85 All videos were shot at 4K24P, face detection, otherwise all default settings.
Panasonic has just sent me the new firmware 1.0 for the Panasonic GH5S so I thought it’s a good time to re-test the autofocus tracking performance in video mode again as the last time was done on firmware 0.2.
This time I’ve compared 4 of latest Panasonic cameras together including the big 3 GH5,GH5S and G9 and my own G85
– Panasonic Lumix GH5S (firmware 1.0) | Leica DG 12-60mm f/2.8-4
– Panasonic Lumix GH5 (firmare 2.2) | Leica DG 12-60mm f/2.8-4
– Panasonic Lumix G9 (firmware 1.0) | Leica DG 12-60mm f/2.8-4
– Panasonic Lumix G85 (firmware 1.2) Lumix 12-60mm f/3.5-5.6

So what do you think about GH5S’s video mode autofocus performance? Is it better than the other three cameras?