How can I hide Youtube controls but show the Fullscreen button?

Question

I am trying to hide the controls, but show the youtube fullscreen button, so that the player looks like the vimeo player.

I have added the following parameters after my embed URL:?&controls=0&showinfo=0&rel=0&fs=1

However, it only hides all of the controls. Is it possible to only show full screen button?

Note: the <iframe allowfullscreen> has this option set.

Answer 1

As of September 2018, this doesn't seem to be possible directly with the YouTube iFrame Player API. You can hide all controls (controls=0), or you can hide the fullscreen button specifically (fs=0), but you cannot exclusively display the fullscreen button by itself (i.e., controls=0&fs=1 won't work.)

However, conceivably you can hide all controls and overlay your own custom fullscreen button, and use the browser Fullscreen API to invoke fullscreen on the iframe.