Could be the propellers, one of the motors, IMU or gimball calibration. Check everything. My Avata was shaking worse than yours. But in my case was the rear right motor. Also make sure your props are in good shape, also check all the screws are properly tighten. Pretty much everything can cause what you can see. I just hope is not the motor.
Méchant beau vol! Félicitations!
Could be the propellers, one of the motors, IMU or gimball calibration. Check everything. My Avata was shaking worse than yours. But in my case was the rear right motor. Also make sure your props are in good shape, also check all the screws are properly tighten. Pretty much everything can cause what you can see. I just hope is not the motor.