Como mostrar um vídeo do youtube com loop

[fonseca.mah]

Oie Galera fiz vários testes de inserção, mas nenhum teve a solução que preciso, veja se vocês tem como me auxiliar:

Este código abaixo funciona e o autoplay funciona

<object width="853" height="480">
<param name="movie" value="http://www.youtube.com/embed/RYowuKjPl90">
</param>
<param name="allowFullScreen" value="true">
</param>
<param name="allowscriptaccess" value="always"></param>
<embed src="http://www.youtube.com/embed/RYowuKjPl90&autoplay=1&rel=" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="853" height="480"></embed>
</object>

Estes testes abaixo não funciona o loop:

<object width="853" height="480">
<param name="movie" value="//www.youtube.com/watch?v=RYowuKjPl90?version=3&amp;hl=pt_BR&autoplay=1"></param>
<param name="allowFullScreen" value="true"></param>
<param name="allowscriptaccess" value="always"></param>
<embed loop=true autostart=true src="//www.youtube.com/watch?v=RYowuKjPl90?version=3&amp;hl=pt_BR&_s&autoplay=1" type="application/x-shockwave-flash" width="853" height="480" allowscriptaccess="always" allowfullscreen="true"></embed></object>

<pre>
<script type="text/javascript">
if(navigator.userAgent.indexOf("MSIE") != -1)
document.writeln ('<bgsound width="853" height="480" src="http://www.youtuberepeater.com/watch?v=lIGqgbl0vBU&autoplay=1" loop=infinite hidden=true volume=100>');
else
document.writeln ('<embed width="853" height="480" src="//www.youtube.com/watch?v=RYowuKjPl90?version=3&amp;hl=pt_BR&_s&autoplay=1" loop=true autostart=true volume=100>');
</script>
</pre>

<div style="text-align: center; margin: auto">
<object type="application/x-shockwave-flash" style="width:853px; height:480px;" loop="true" data="http://www.youtube.com/watch?v=RYowuKjPl90?color2=FBE9EC&amp;loop=1&amp;autoplay=1&amp;version=3&amp;modestbranding=1">
<param name="movie" value="http://www.youtube.com/watch?v=RYowuKjPl90?color2=FBE9EC&amp;loop=1&amp;autoplay=1&amp;version=3&amp;modestbranding=1" />
<param name="allowFullScreen" value="true" />
<param name="loop" value="true">
<param name="allowscriptaccess" value="always" />
</object><div style="font-size: 0.8em">

<iframe width="853" height="480" align="middle" src="//www.youtube.com/embed/RYowuKjPl90&autoplay=1&loop=1" frameborder="0" allowfullscreen></iframe> 

Por favor me ajudem a identificar o que esta errado, ou se tiverem um código funcionando ou ideias me passem.

[fonseca.mah]

Consegui, ficou assim:

<div style="text-align: center; margin: auto">
<object type="application/x-shockwave-flash" style="width:853px; height:480px;" loop="true" data="https://www.youtube.com/watch?v=RYowuKjPl90?version=3&autoplay=1&loop=1&playlist=RYowuKjPl90">
<param name="movie" value="https://www.youtube.com/watch?v=RYowuKjPl90?version=3&autoplay=1&loop=1&playlist=RYowuKjPl90" />
<param name="allowFullScreen" value="true" />
<param name="loop" value="true">
<param name="allowscriptaccess" value="always" />
</object>
</div>

Espero que ajude mais alguém ;)