I think I remember one of my first clips from my Mavic Air came out like this - I think I had 2.7k/24fps set for some reason. Fairly certain that the video editing software that was used has created this effect and you should be able to redo it with the raw and get a better result - it might also have been YouTube. I shoot 4k/30fps now and always get smooth results.
It is a very interesting target - I love the martian landscape surrounding it!