Using youtube_player_flutter package

//Have to define the _controller inside initState() to make it work properly.
//Inside StateFulClass:

YoutubePlayerController _controller;

@override
void initState() {
  _controller = YoutubePlayerController(
    initialVideoId:
        YoutubePlayer.convertUrlToId(widget.videoLink),
    flags: YoutubePlayerFlags(
        mute: false,
        autoPlay: true,
        disableDragSeek: true,
        loop: false,
        enableCaption: false),
  );
  super.initState();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: YoutubePlayer(
      controller: _controller,
      showVideoProgressIndicator: true,
      bottomActions: <Widget>[
        const SizedBox(width: 14.0),
        CurrentPosition(),
        const SizedBox(width: 8.0),
        ProgressBar(isExpanded: true),
        RemainingDuration(),
      ],
      aspectRatio: 4 / 3,
      progressIndicatorColor: Colors.white,
      onReady: () {
        print('Player is ready.');
      },
    ),
  );