videoplayer_controller.dart

  void main() {
    initState();
  }
 
  VideoPlayerController videoPlayerController;

  void initState(){
    videoPlayerInit();
  }
  Future<String> getU() async {
    var url = "stackoverflow.com";
    return url;
  }

  void videoPlayerInit() async {
    var url = await getU();
    videoPlayerController = VideoPlayerController.network(url);
    print("videoPlayerController initialised");
  }

class VideoPlayerController {
  String url;
  VideoPlayerController.network(this.url);
}