That Thislegorm video is very impressive, only thing I can say in terms of the colours is that it appears a fisheye lens was used, so minising the amount of water between camera and wreck which is proving some excellent colours. But still I think we all know it's a canon eh! :-)
As to camera upgrades and equipment. I've gone back for the time being to 1080 but filming at 60fps - this has made a massive difference to the quality of my videos, yes I've now got a GH5, but going to stick with the GH4 for a while and improve my craft using what I have. Been really enjoying filming with a red filter - very little to adjust in post and the foreground colours really do pop.
Hoping we get an answer on how well the xrite survives the water
Regards - Richard
Yes.. definitely a fisheye lens, which means it was a DSLR, which, given the timeframe, probably means a Canon 5D Mark II. No real secret that the Canons have always produced nice white balance results at depth with good noise characteristics too because of the large sensor.
As for the whole equipment vs. skill debate, I think it's definitely true that what you put in front of the camera, the story, and the skill of the camera operator, director and editor ultimately have a much larger impact on the overall production value of a film than any technical characteristics of the camera itself. That said, equipment does impose real limitations -- for example, you won't be able to include nice slow motion sequences if your camera can't shoot at 48 or 60fps, and to get really nice colors at depth you're going to need a camera that can white balance well, powerful video lights, or both.
So I definitely understand why people ask what camera was used to film something -- it can be important information. On the other hand, I do sometimes feel frustrated when others ask me what camera I used to film something because it does feel like less experienced shooters ascribe the overall quality of the finished product to the camera choice -- when in fact other factors make much more of a difference. Hard as a creator to not feel like your skill isn't being unappreciated by the lay public at times.
Regarding Florian's work, I'm pretty sure Angel of the Deep was filmed primarily using a Red Scarlet-W. That said, most of Florian's projects before 2017 were filmed on a GH4 I believe. Actually, going through Florian's work in chronological order is quite interesting. You definitely see the way he's improved over time. And very little of that improvement has to do with gear, IMO.