chromium/third_party/blink/web_tests/media/video-rotation.html

<html>
    <head>
        <title>Tests video rotation.</title>

        <script src=media-file.js></script>

    </head>

     <body>
        <video width=320 height=240
          src='content/bear_rotate_90.mp4'></video>
        <video width=320 height=240
          src='content/bear_rotate_0.mp4'></video>
    </body>
</html>