Adding animation for object to timeline at runtime

Hello everybody,

I am currently playing around with the new timeline feature in unity. What I am trying to do is to assign an AnimationClip(I recorded at runtime) to an object of the scene AND add it to the timeline. Assigning the AnimationClip to the object through this code

 PlayableDirector scenePlayableDirectorComponent;
 AnimationClip clip;
 Animator animatorOfSelected;
 GameObject toAssignAnimationTo;
     
 //get Animator of object to assign animationClip to
 if (toAssignAnimationTo.GetComponent<Animator> () != null) {    
         animatorOfSelected = toAssignAnimationTo.GetComponent<Animator> ();
 } else {
         animatorOfSelected = toAssignAnimationTo.AddComponent<Animator> ();
 }
 
 //instantiate playable for animationClip
 AnimationClipPlayable playable = AnimationClipPlayable.Create(scenePlayableDirectorComponent.playableGraph, clip);
 
 //Create output for animator of object to assign animationClip to
 AnimationPlayableOutput output = AnimationPlayableOutput.Create(scenePlayableDirectorComponent.playableGraph, toAssignAnimationTo.name + " output", animatorOfSelected);
 
 //setSourcePlayable for output
 output.SetSourcePlayable<AnimationPlayableOutput, AnimationClipPlayable> (playable);

works fine.

But I want the animation to appear in the timeline I created in the editor.

My approach is this:

 GameObject toAssignAnimationTo;
 PlayableDirector scenePlayableDirectorComponent;
 
 //get timelineAsset from playableDirector
 TimelineAsset timelineAsset = (TimelineAsset)scenePlayableDirectorComponent.playableAsset;
 
 //create new animationTrack on timeline
 var newTrack = timelineAsset.CreateTrack<AnimationTrack> (null, "Animation Track " + toAssignAnimationTo.name);
 
 //bind object to which the animation shell be assigned to the created animationTrack
 scenePlayableDirectorComponent.SetGenericBinding (newTrack, toAssignAnimationTo);
 
 //create a timelineClip for the animationClip on the AnimationTrack
 var timelineClip = newTrack.CreateClip (clip);

which seems to go into the right direction:

But the animation on "Cube" is not doing anything(the animations for "redCube" and "blueCube" were recorded in the editor, they work fine).

I hope somebody give me some advise, Thanks in advance!