My Drone Under Attack by Supersonic Flying Object

My hobby is shooting natural landscapes with drones.
A few days ago, I went to Surisan(mountain) near my house(South Korea).
But suddenly, during the shooting, the drone began to shake violently.
At first, I thought the wind would blow hard or the bird would attack.
And when I got home, I looked at the video on my computer, and I looked at it very carefully, and there were supersonic objects that I couldn't quite understand.
Please identify those objects.
An ornithologist or scientist. Anyone will be fine.
I also promise a reward worth $200 to those who reveal the supersonic objects' identity.
I'm so curious about this.
(My neighbors say they will also pay a reward for this video. We'll notify you as the reward increases.)
There's a lot of similar videos on TH-cam.
Link the first image that appears.
youtube/r855Hp4nbGQ
(It's my first time editing video, so I'm not very good at it. Please understand.)