How do I interact with the overlay widget

How do I interact with the overlay widget. It does not seem to respond to any click events. Below is my sample code:

Future initVideoPlayer() async {
await _controller.initialize();
setState(() {
_chewieController = ChewieController(
videoPlayerController: _controller,
aspectRatio: _controller.value.aspectRatio,
autoInitialize: true,
fullScreenByDefault: true,
overlay: overlayWidget(),
showControls: true,
placeholder: buildPlaceholderImage());
});
}

overlayWidget() {
return IconButton(
icon: Icon(Icons.edit),
color: Colors.yellow,
onPressed: () {
**//this is never called, how I get this working**
print('icon clicked');
},
);
}