User Selection: Markup

<par>
    <video id="vid1" .../>
    <excl>
       <par begin="englishBtn.activateEvent" >
          <audio begin="vid1.begin" src="english.au" />
       </par>
       <par begin="frenchBtn.activateEvent" >
          <audio begin="vid1.begin" src="french.au" />
       </par>
       <par begin="portugeseBtn.activateEvent" >
          <audio begin="vid1.begin" src="portugese.au" />
       </par>
    </excl>
 </par>