When I was to choose action camera I bought Contour GPS for some reasons. It show good results though we used it on helmets only. Anyway it looks like its math is good enough to eliminate vibs from video. Something like these:
MTOsport cross-country
One more MTOsport cross-country
What I didn't like was this camera has no remote control. Next gen is Contour+2 which us able to use iPod/iPad as a remote control&visor via Bluetooth.
This is a sample: Xenon gyroplane demo flight
Note that outside views are very stable - rigid mount. Cockpit view is a trash since it was mounted on a 2-inch lever.
So - rigid mount on massive airframe elements. One more suggestion is that vibs are less when camera is closer to aircraft CG.
Fly fun,
Alex