Leaning movie clips

[DaBone]

Have a colleague who bought a OSMO, but who have problems with the image, which are tilted all the time.
If you look at the Youtube link below, you will understand what I mean.

Is there any good way to avoid this, or is it merely to get a better editing program than he has, and then correct it in this?

 

[Kauaigene]

Re-Calibrate Gimbal perhaps