HTML - Video Embedding Problem

I'm having trouble with embedding multiple videos to the same player. I'm not using asx files, but rather wmv to make a selection-list. I found a site that solved my due problem and the thing works. however!! The URL in the code refers to youtube videos, and that's great and all, but I needed 'em to link to my own media files. so I changed the URL's to those on my server, and here's the problem: when doing it offline with the files on my harddrive I can add as many files I want to without it complaining, but the second it goes online or I link to wmv files on the internet it can't seem to get a connection. It only works if I have but a single <div> entry typed. As soon as I add more the thing bugs. I even tried changing "application/x-shockwave-flash" to "application/x-mplayer2" Please!! Any solution to this?? What am I doing wrong??

Example with ref's to youtube-videos, below.

<div id='videoPlayback' style='width: 435px; height:350px; background-color: #800000;'></div>

<div id='selectDemo2' style='display: none'>
<object width="320" height="285">
<param name="movie" value="http://www.youtube.com/v/c6SHsF1n9Qw"></param>
<param name="wmode" value="transparent"></param>
<embed src="http://www.youtube.com/v/c6SHsF1n9Qw&autoplay=1"
type="application/x-shockwave-flash" wmode="transparent"
width="320" height="285"
autostart=0
showstatusbar=1>
</embed>
</object>
</div>

<div id='selectDemo2' style='display: none'>
<object width="320" height="285">
<param name="movie" value="http://www.youtube.com/v/-is63goeBgc"></param>
<param name="wmode" value="transparent"></param>
<embed src="http://www.youtube.com/v/-is63goeBgc&autoplay=1"
type="application/x-shockwave-flash" wmode="transparent"
width="320" height="285"
autostart=0
showstatusbar=1>
</embed>
</object>
</div>

<A HREF="#" onclick='return playVideo("selectDemo1","videoPlayback")'>RvD2: Ryan vs. Dorkman 2</A>
<BR>
<A HREF="#" onclick='return playVideo("selectDemo2","videoPlayback")'>Beatboxing Flute <q>Peter and the Wolf</q></A
<BR>

<script type="text/javascript">function playVideo(sourceId, targetId) { if (typeof(sourceId)=='string') {sourceId=document.getElementById(sourceId);} if (typeof(targetId)=='string') {targetId=document.getElementById(targetId);} targetId.innerHTML=sourceId.innerHTML; return false;}</script>