Hello guys, I'd like to post my problem here before, eventually, guarantee request.
To the point.
I noticed, that videos have some kind of 'waving' (jello?) effect - some part of frames are moving (shaking) horizontally.
I did not crash or something, the weather was clear with small wind there.

I did firmware update, all kinds of calibrations, change propellers to fresh ones - with no luck.

Please check attached video - https://www.youtube.com/watch?v=FXM0Lp9syH0

Found an issue, I guess.
Recently I replaced body from transparent to the green one.
And during that I must took off rubber which stabilizes gimball...

Thank you for reaching out and we're sorry for the unpleasant experience. In this kind of situation, I'm afraid that you may consider sending the unit in for a proper diagnosis. You can contact our support team to start up a ticket at https://www.dji.com/support. Also, the warranty can be applied depending on the outcome of the damage assessment including the warranty period of your unit. To check the warranty period for each part, you may click this link: https://www.dji.com/service/policy. Thank you for your kind and understanding.

No need to requesting warranty anymore.
This rubber thing was an issue.
I hooked it and now video are smooth as they used to be.