It still doesn't look like the quality you'd get from a source file on the microsd card of the drone.Throughout the footage you see the image getting constantly refreshed and also what it seems to be initial drops in video signal.
I don't mean to sound repetitive, but are you really sure this is the file that is stored on the microsd card on the drone ? You shouldn't use any files stored on your phone (either in memory or on an sdcard, if you're on Android) for editing purposes. A good indicator will be the size of the file. If you're using a file stored on the microsd card of the drone the file will probably be in the order of several hundred MB or a couple GB, if you're using the one on the phone, the file size will be much smaller.
But, assuming this is really the source file stored on the sdcard on the drone, and that it wasn't compressed afterwards, resulting in quality degradation, the first few seconds it seems the sdcard was having trouble keeping up with the volume of data being saved. What type of sdcard are you using ? What resolution were you recording at ? I typically try to use microsd cards that have a 90MB/s write rate to make sure that even at 4k I won't have problems with the sdcard not being able to handle the volume of data being saved. You should be using a class 10 microsd card with high-bandwith capability (in the ranges of 90MB/s write rate).
Other than that, I can't think of anything else.