True Hendrik, this last part of your video shows "ref frames" in AE works like "cleanplates" in Mocha Pro.
I also agree with Annaël here
For some of the easy shots, it might work a treat, so that's more than welcome to have this feature in Resolve. Furthermore, Mocha Pro 2019.5 OFX plugin is said to be compatible with Resolve, so we will be actually able to use it directly in Resolve as an OFX.
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I suspect it won't be so easy to have great perf of Mocha inside Resolve, but for sure I will try.
This said, this is now very personal but I confess it doesn't bother me at all to gather specific jobs for Mocha Pro standalone, even if it's wasted time compared to an ofx allowing to remain in Resolve.
BUT, some might share my opinion when i tell you i prefer super stable and great performance solutions over sloppy OFXes, so time is not wasted for me when you opt for a rock solid workflow... For example, so far I'm still one of those who make Fusion Connect to find the standalone, make the job and refresh in Resolve than ReFusion. I'll change soon probably but this is no problem for me.
So when I chat with Mary at (ex Imagineer S.) BorisFX, I can read that they're asked for numerous questions about issues of Mocha's integration in Premiere.
If it's the same, I'll keep the standalone but of course, Mocha inside Resolve is super welcome ! [/personal POV]