Object rotation in 360 Is it possible to make an object rotate, when the viewer rotates the screen on YouTube in 360? So, it wouldn't depend on the camera, rather than the viewer himself/herself.
Yes.

Keyframe the rotation on the axis you like.
For example 


Object mode, select object,
select frame 0, insert keyframe rotation
select frame 40, rotate z 180, insert keyframe rotation
select frame 80, rotate z 180, insert keyframe rotation
play the animation frames  0-80 and witness the revolution
improve the animation


If you need a video tutorial please state so in the comments.