title: Fetch partial content (206) with Object URL
body: <p>I have an API that returns video stream with partial content (206) support. But this API needs some custom headers like authentication, so I use <code>fetch</code> to get the stream and create object URL.</p>
  <p>I've created a fetch request:</p>
  <pre><code>let vidSrc = fetch(&quot;.../video&quot;, {
     headers: {
         Authorization: ...
     }
  }).then((data) =&gt; {
     return URL.createObjectURL(data);
  });
  
  videoElement.src = vidSrc;
  </code></pre>
  <p>But then the object URL doesn't transfer the range request to the API service.</p>
  <p>How can I get the partial content support with fetch and object URLs?</p>