Add 'https://www.youtube-nocookie.com' in origin

 _controller = YoutubePlayerController(
   params: const YoutubePlayerParams(
     showControls: true,
     mute: false,
     showFullscreenButton: true,
     loop: false,
     origin: 'https://www.youtube-nocookie.com', // add this line
   ),
 );

_controller.loadVideoById(videoId: YoutubePlayerController.convertUrlToId("https://www.youtube.com/watch?v=_57oC8Sfp-I")??'');