A bit more setup.
Lessons learned from good old Youtube and my previous Phantom
1. I have reset the frame rate of the video. I tried 60 fps but that is obviously too high, I was under the impression higher the better......... Wrong. I got blurred bits on turns. 60 fps for slow mo? So now its back to 30 fps.
2. NTSC or Pal. I thought as I was in the UK I would obviously need PAL ........... wrong. Basically if flying outdoors use NTSC. Too complicated to go into why now.
Also set video to DLOG. A personal preference but it seems to give better video results. 3840 X 2160 size. MP4 format, again personal preference.
Cinelike is usually better than dlog. The P4P camera is not good enough to take advantage of Dlog. You can check the forums, there are plenty of interesting discussions about this.
Curious about your NTSC reason...