if you want smooth video movement use Litchi app and program your flight path from your computer at home.
I use al the time now and my videos are incredibly smooth.. there is no way you can achieve that kind of perfect change of direction and camera movement manually.
I also use 4k video 24fps and take screen shots after for the photos i want .. do not bother taking photos while flying.
I also fly at sunset - evening sometimes and then you need to use manual photo settings with iso 100 for minimum grain noise and then speed i set to 5-6 secs. Aperture is not available as option as far as i know.
the magic is incredibly stable as was the
phantom 4 which i also have.
i have attached a low resolution photo taken at night so you have an idea.
and this is a video taken with litchi pre-programmed flight path: