G85 overheating? record time? light sensitivity? stabilization?

properly lit, framed, color balanced, etc. Of these, focus would seem to be the only part that would possibly be harder. I can't imagine that you are saying the G85 AF performs poorly at 4K and acceptably at 1080p! Makeup? Plastic surgery for 'talent'?

I think I did not write that AF is worse on 4k than on 1080p, but I do now: AF speed

can be a lot slower when shooting 4k instead of 1080p. Both 4k video and AF require a lot of processing power. For example, look at this post:

I didn't understand your earlier comment to be about AF performance. I am under no illusions here. True, AF is more critical at 4K but in several other comments in this thread suggest that G85 & 4K is not a 'viable option' - my  paraphrase. I should not use the camera in 4K because _________, is equally an assertion that the G85 is a 'dog' - I should look elsewhere. When Panasonic added 4K to this design they also added processor power, firmware, tightened electromechanical specifications, etc. to support it. In doing so, those improvements can reasonably be expected to improve 1080 performance as well. That improvement can not credibly be used as a 'proof' that 1080 should be used and 4K should be avoided. It may be Panasonic may not have succeeded in implementing 4K well enough to satisfy some or many users. My stated interest is in users experiences that correlate in some way to my use case.

https://www.dpreview.com/forums/post/58948226.

That being said, AF will probably not be an issue.

Agreed. If I thought it was, I wouldn't be here. AF while of great concern (actually primary), it is something that can be managed very well using one of several methods. Also reports indicate that while AF is not leading the competition it is very much usable.

Quite honestly, I think the scenario is so basic that I think the OP is overthinking it due

FYI, Pointing and laughing is rude.

In fact I am not "overthinking". It is precisely because of my "experience" I know that the details are critical to get right in an endeavor such as I am undertaking. That what I don't know by direct experience can be obtained by only one of 2 methods:

1) Buy the equipment (I don't think rental is an option) and find out by actual trials. In this case my OP is pointless as are all replies to it. The same can be said for a large portion of the activity on these fora. Some posting here would do well to keep this in mind.

2) Find others with the equipment I am considering, describe to them my plans, ask about their experiences, weigh them carefully and then make a decision.

The second option requires a lot more thinking. Far better than spending the kind of money involved only to find the equipment will not meet expectations.

I have a great deal of experience with complicated systems. Ones that work well and those that were poorly thought out, implemented, etc. My experience tells me that careful thought and a thorough understanding of the system in question is the only way to avoid ruinous pitfalls. Throughout my years I have seen numerous disasters coming, helped avoid a few, and been very successful using the thoughtful approach in undertakings I have been responsible for.

to lack of experience and in reality, nothing will be an issue

I have every intention of seeing to it that indeed there will be no surprises. If you refer to my OP, the questions put were all based on specific aspects of the G85 and kit lens and another closely related Panasonic lens that hinted at such pitfalls.  I also gave a basic overview of the primary application to help keep the dialog focused.

QT