Replace youtube video player with a different div

[nasekt]

I'm using Fiddler (web debugging tool) and the below code is JScript .NET, which is basically a .NET version of Javascript.

if (oSession.HostnameIs("www.youtube.com") && oSession.oResponse.headers.ExistsAndContains("Content-Type","text/html")) // oSession is a Fiddler object session    {              oSession.utilDecodeResponse();   // Remove any compression or chunking          oSession.utilReplaceInResponse('<b>','<u>');  // Search and replace in HTML        }

How do I replace youtube video player with this message?

<div id="player-unavailable" class="  player-width player-height    player-unavailable ">                <div class="icon meh"></div>  <div class="content">    <h1 id="unavailable-message" class="message">            This video is no longer available because of inappropriate content.    </h1>    <div id="unavailable-submessage" class="submessage">Sorry about that.    </div>  </div></div>

Thank you