It doesn't seem to do it when it's that low, I think in high winds it does it, but then correct itself, it's almost like it takes a second or two to adjust to a gush of wind before giving me smooth video once again.Not so sure that its a wobble/wiggle. It is more pronounced near the top of the video than it is the bottom. Have you tried shooting video at an altitude you can observe the camera at, say 6 ft?
Would a IMU calibration do anything? I'm not even sure what that is really...but read about it helping with this kind of behavior.Important to note, this is not normal behavior even in windy conditions. I hope you get it figured out.