i tried imu cali gimbal cali but it didnt work..,; how to fix it
https://youtu.be/vHFs1Z1RJTc

Just to clarify, this is the main controller or not? If yes, please try to re-link RC and AC.
May I know the firmware version for AC and RC? both are up to date?
Please try another RC or gimbal to check the performance if convenient, thanks.

it was fpv mode ;;,

If problem persists after you tried the troubleshooting, please feel free to get in touch with our tech support via support.kr@dji.com to send it in for evaluation, they will help you handle this case.