MombasaFlash
Heli's & Tele's bloke
... shoot the video with only tilt compensation. Let the gravity take the roll after CG'ing the camera on the gimbal. Now that I know this works, ....
Really? I cannot say I EVER had any good results leaving horizon control up to gravity. The one thing I could always count on was the horizon leaning one way or the other, depending on which direction I was flying, whether the heli turning or if the wind was blowing a bit.
Sorry, but your video doesn't look much better. The Roll axis is THE most important and is HAS to be driven. Gravity is definitely not sufficient.