title: How change the video tag poster attribute with javascript?
body: <p>I want to use either native JavaScript or jQuery to change the poster attribute on the HTML video tag. Any help would be greatly appreciated.</p>
  
  <pre><code>&lt;div id="videoplayer" class="video-player" style="overflow: hidden; width: 582px; height: 326px; "&gt; 
      &lt;div id="myPlayer"&gt; 
          &lt;video id="htmlFive" width="100%" height="100%" controls="" poster="undefined"&gt;
              &lt;source src="blank.m3u8"&gt;
          &lt;/video&gt;
  &lt;/div&gt; 
       &lt;/div&gt;
  </code></pre>
  
  <p>Thank you!</p>