I have put this code, But it's doesn't work with my youtube video, Following the below code is doesn't work

playerVars: { loop: 1, playlist: 'ABC', mute: 1, controls: 0, rel: '0', iv_load_policy: '3' }

var tag = document.createElement('script');

      tag.src = "https://www.youtube.com/iframe_api";
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

      var player;
      function onYouTubeIframeAPIReady() {
        player = new YT.Player('player', {
          height: '390',
          width: '640',
          videoId: 'ABC',
                playerVars: {
                  loop: 1,
                  playlist: 'ABC',
                  mute: 1,
                  controls: 0,
                  rel: '0',
                  iv_load_policy: '3'
                },
          events: {
            'onReady': onPlayerReady,
            'onStateChange': onPlayerStateChange
          }
        });
        
      }

      function onPlayerReady(event) {
        event.target.playVideo();
        event.target.mute();
      }

      function onPlayerStateChange(event) {
      }