fullscreenChanged = () => {
				if (player.isFullScreen) {
					if (Features.isFullScreen()) {
						player.isNativeFullScreen = true;
						// reset the controls once we are fully in full screen
						player.setControlsSize();
					} else {
						player.isNativeFullScreen = false;
						// when a user presses ESC
						// make sure to put the player back into place
						player.exitFullScreen();
					}
				}
			}
Detect any changes on fullscreen

Chrome doesn't always fire this in an `<iframe>`
@private