I'm experiencing some minor problems with video encoding on my mavic pro. If you look at this video:
at 2:39, in the dark green area in the upper right corner, I see what looks like some compression artifacts, and, even more clearly, when adjusting the gimbal up at 3:40, in the area around the tower windows, you see like heavy grain on the image while the gimbal pans up.
Don't use the apps encoding ability. I don't think I have ever used it. Use one on your PC instead.
I have been keeping up on the free tools. Kdenlive may be a little buggy still, but Davinci isn't though it comes with a 2.7K (1440p) or lower resolution limit.