Actually, just copy-pasting keyframes from x position to Y rotation will not only copy keyframes and handles, but also convert units (i.e. I had 5m for rotation and handle values, it got converted automatically to 360 * 5 / 2pi = 286 degrees). So simple copy-pasting just works in this case.
But, copy pasting is pretty bad because it won’t respect changes (i.e. if I modify x position I’ll have to copy-paste into y again). Is it possible to make two channels share the same underlying keyframe data (maybe using groups or something, or do I need drivers)?
