Just managed to see it. This is the problem that I keep commenting on with Fuji "pro" stuff, they are too heavy. There are people who then say that they are still lighter compared to what they are used to from DSLR but this video goes against it.
Now, outside of weather sealing I do question the need for very wide aperture zooms for a hiking trip; either way Fuji still doesn't have smaller WR zooms. The future 16-80 F4 should fix that in the most used range, provided that it had good image quality. The 8-16 F2.8, not so much.
I just saw the video as well, and have to say an f/2.8 system for hiking is only for the young and strong, or the crazy.
Not including L plates and accessories, his system is just over 2.4 kg and the Fuji system I'd choose is 1.4 kg:
XT-2, 18-55 and the 55-200. I've carried them for 6 day hikes and they do just fine. Both these lenses are highly underrated. I've used the Canon lenses he mentions and the Fuji lenses are a match if you don't need the f/2.8 on the short zoom.
The Fuji 50-140 is a league above anything I've shot with in the past, but too big for putting in a hiking backpack. It's not just the weight to consider.
David