Sorry my english is not perfect.. but I just made a first flight with my mavic mini.
The photo's are fine, but the video on 2.7K is just full of stops/hiccups/interruptions. It is not fluent.
It runs for a second or two, then stops for a second and continues again, it s*cks.
Here is a quick Apple based visual aid of their resolutions including the Mavic Pro and the Mavic 2 Pro.
Highlighted in red are the ones I use most frequently.
I film in 2.7k because I rarely crop my footage.
Also, it saves SO much space shooting in a lower resolution.