What does this mean when the gimbal keeps tilting up and and down after turning on?

It may have not been activiated for a couple years.

Hello there. I am sorry for the trouble this has caused and thank you for providing this video of the issue. May we please know before having this issue did your DJI Phantom 4 had a hard landing or a crash before and have you tried calibrating the gimbal of the DJI Drone as well for us to be able to isolate the issue? Thank you.

Stored in app as long as they are not deleted.