Hello,
Since you are trying to place three players on a single page you usually need to create duplicate copies of the player elements with different names to be called from each player and each player.
In the page you listed I see the following:
<script src="catalog/view/javascript/media/mediaelement-and-player.js" type="text/javascript"></script>
Can you try copying this script and renaming it to:
<script src="catalog/view/javascript/media/mediaelement-and-player2.js" type="text/javascript"></script>
and
<script src="catalog/view/javascript/media/mediaelement-and-player3.js" type="text/javascript"></script>
And then calling these scripts separately form each player implementation?
Regards
Jason Hatchett