The video does not show it the gimbal is balanced. It shows that the camera is not pointing ahead and that the gimbal returns to level. When balanced it should not return to level, but stay in any position.
Your 'I' is 0, should not be.
My guess is that the problem is in basic setup.
- Are the motors correctly connected? see the instructions. some boards have wrong labelling.
- Is motor Auto setup performed and pole numbers manually corrected?
I have another problem - pitch axis motor starts buzzing in straight position even on pid 0-0-0, it stops buzzing in different position. I also set Adaptive PID that eliminated some of oscillations. What can it be? Thanks for your help :)
Your 'I' is very low compared to P and D. have you tried to autotune it? Try one axis at time with good stability setting, starting from pitch axis. Set PID for other axis so that they do not vibrate when tuning the Pitch.
Try also adjusting Power. More power for Yaw, just make sure that no motor is getting hot.