<?xml version="1.0"?>
<svg version="1.2" baseProfile="tiny" xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink"
     width="100%" height="100%" viewBox="0 0 400 300">
     <desc>Example of switching on the http://www.w3.org/TR/SVG12/feature#ComposedVideo feature string</desc>
     <rect x="2" y="2" width="396" height="296" fill="none" stroke="black"
                  stroke-width="2" />
     <rect x="106" y="66" width="184" height="140" fill="none" stroke="blue"
                  stroke-width="4" />

     <switch>

       <!-- Composited video group -->
       <g transform="translate(100 0)" requiredFeatures="http://www.w3.org/TR/SVG12/feature#ComposedVideo">
         <video xlink:href="ski.avi" audio-level=".8" type="video/x-msvideo"
                   x="10" y="70" width="176" height="132"/>
         <text x="20" y="100" fill-opacity="0.5" fill="blue" font-size="20">Composited title.</text>
       </g>

       <!-- Overlayed video group -->
       <g transform="translate(100 0)" font-size="18">
         <video xlink:href="ski.avi" audio-level=".8" type="video/x-msvideo"
                   x="10" y="70" overlay="top" width="176" height="132"/>
         <text x="15" y="60" fill="blue" fill-opacity="0.5" >Non-composited title.</text>
       </g>
     </switch>
</svg>