How to add button to JW Player control panel using Javascript API?

There is a method in the official documentation -

addButton(icon, label, handler, id)

      

        
        
        
      

    

But this adds a button in the Video area.

I want to add a button on the control bar besides the Play Pause button. Is there an option in JW Player.

Fiddle

PS - I don't want to embed the html myself into the player. I want to use a built-in function.