help me !Cannot make videos to play on fullscreen

this is my code . is it right?
help!!!!!!
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class _HomePageState extends State {
String url = 'https://www.doudoudm.com/';
final flutterWebViewPlugin = FlutterWebviewPlugin();

@override
Widget build(BuildContext context) {
return WebviewScaffold(
url: url,
appBar: AppBar(
title: const Text('animation'),
elevation: 0.0,
centerTitle: true,
leading: IconButton(
icon: Icon(Icons.menu),
onPressed: () => Navigator.of(context).push(MaterialPageRoute(builder: (context) {
flutterWebViewPlugin.hide();
return MyPage();
})).then((value) => flutterWebViewPlugin.show())),
),
withZoom: true,
withLocalStorage: true,
withJavascript: true,
hidden: true,
displayZoomControls: true,
initialChild: Container(
width: double.infinity,
child: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'Loading.....',
style: TextStyle(color: Colors.pinkAccent),
)
],
),
),
),