It's a flying camera. Gotta learn flight, and photography basics!
All great answers.
With regards to what gasjkh2 said, first turn on the histogram and learn how to use it, along with the rest of the snapshot and video settings. Play with it all while the aircraft is on but motors off, camera pointed in the direction of something interesting. No need to burn through batteries just to learn the camera.
Then, if you don't mind losing the instant gratification of being able to pull the SD card out to show off what you have captured, you could change the video capture to D-Log mode (and set your exposure and white balance manually). The problem with D-Log is that right off the card, without any additional processing, all the video will look flat, washed-out and lifeless. Then you install video editing software to process your videos and make 'em al dente.
There are tons of web sites and YouTube videos which explain what D-Log is and what color grading does. Google away.
But one step at a time!!!
And seriously, no shame in staying away from D-Log. But watch that histogram!!!