YouTube Iframe API onError event does not fire in recent months

Question

I'm pretty sure YouTube Iframe API "onError" event will fire in the past since I run a project based on this API. But recently "onError" event will not fire, even the simplest error.

This is a simple sample code based on official page( https://developers.google.com/youtube/iframe_api_reference ) and is workable:

<iframe id="existing-iframe-example"
        width="640" height="360"
        src="https://www.youtube.com/embed/M7lc1UVf-VE?enablejsapi=1"
        frameborder="0"
        style="border: solid 4px #37474F"
></iframe>

<script type="text/javascript">
  var tag = document.createElement('script');
  tag.id = 'iframe-demo';
  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('existing-iframe-example', {
        events: {
          'onReady': onPlayerReady,
          'onStateChange': onPlayerStateChange,
          'onError': onError
        }
    });
  }
  function onError(event) {
    console.log(event.data)
  }
  
  function onPlayerReady(event) {
    
  }

  function onPlayerStateChange(event) {
    console.log(event.data);
  }
</script>

Once change the video id string "M7lc1UVf-VE" as a wrong one, such as "M7lc1UVf", it should fire "onError" event, but doesn't now.

According to official page guide: https://developers.google.com/youtube/players/support → "Google engineers monitor and answer questions with the youtube-iframe-api tag", hope Google engineers can see this post and fix the "onError" problems.

Answer 1

You need to load the page from a server (not local). Just change it to not load locally.

I was having the same issue, and realized that if I'm loading the page locally most error events wont raise. If I load the page from my azure server, the errors are correct. Also, some videos will not work/load at all if the html is locally loaded.