Paul Draper wrote:Any there any practical differences between using Video Clean Feed vs. (in my case) a DeckLink Mini Monitor 4k?
If the output is not color managed, then it's subject to whatever changes the operating system creates in the signal path.
Read pp. 2284-2285 of the Resolve 16.1.2 manual, the section titled "Limitations When Grading with the Viewer on a Computer Display." This goes into some detail why you cannot accurately monitor directly from the computer and operating system. You have to have a color-managed output, like one from a Blackmagic display card, preferably on a calibrated external Rec709 display. This also includes the so-called "Clean Feed" output mode. If the operating display can affect the monitor, it won't work for judging accurate color.
Even if the monitor is calibrated, color management is still vital. You can use the Clean Feed if you're just editing and accurate color quality doesn't matter.