title: Why background has small dots when I using YoutubePlayerIFrame?
body: <p>I'm using <a href="https://pub.dev/packages/youtube_player_iframe" rel="nofollow noreferrer">youtube_player_iframe</a> for my web app.</p>
  <p>I wrote code below in <code>FutureBuilder</code> in <code>StatefulWidget</code> .</p>
  <pre><code>                  SizedBox(
                      height: 200,
                      width: MediaQuery.of(context).size.width / 3,
                      child: YoutubePlayerIFrame(
                        controller: youtubeController,
                        aspectRatio: 16 / 9,
                      ),
                    ),
  </code></pre>
  <p>This code is the cause of this question. Only when this code is wroten will the dots appear in the background. Like this pic;</p>
  <p><a href="https://i.stack.imgur.com/y9HU4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/y9HU4.png" alt="enter image description here" /></a></p>
  <p>When I remove above code, background is fine.</p>
  <hr />
  <p><code>youtubeController</code></p>
  <pre><code>  YoutubePlayerController youtubeController = YoutubePlayerController(
      initialVideoId: &quot;XgUOSS30OQk&quot;,
      params: const YoutubePlayerParams(
        showVideoAnnotations: false,
        autoPlay: false,
        startAt: Duration(seconds: 0),
        showControls: true,
        showFullscreenButton: false,
      ),
    );
  </code></pre>
  <p>Widgets are working fine except for background glitches. No errors occurred.
  My memory may not be correct, but I feel that this has happened without using a third-party api before.
  What is the solution?</p>
  <p><strong>Additional</strong></p>
  <p>I changed <code>index.html</code> to show loading circle while init, referring <a href="https://itnext.io/fix-flutter-web-loading-time-with-a-loading-spinner-c5dd36a29f5b" rel="nofollow noreferrer">here</a>. Then background is like below:</p>
  <p><a href="https://i.stack.imgur.com/Q5Jpi.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Q5Jpi.png" alt="enter image description here" /></a></p>