<?xml version="1.0" encoding="UTF-8"?>
<VAST version="3.0">
  <Ad id="broken">
    <InLine>
      <AdSystem>QA VAST</AdSystem>
      <AdTitle>Broken VAST Example</AdTitle>

      <Creatives>
        <Creative>
          <Linear>
            <Duration>00:99:99</Duration>
            <MediaFiles>
              <MediaFile delivery="progressive" type="video/mp4">
                <![CDATA[https://example.com/nonexistent.mp4]]>
              </MediaFile>
          <!-- Missing closing tags below -->