Incearca exemplul asta:

<object data="http://www.youtube.com/v/U5O6KfiLVAA&amp;hl=en&amp;fs=1" height="344" type="application/x-shockwave-flash" width="425"><span style="font-size: 8px;"> </span><param name="allowFullScreen" value="true" /><span style="font-size: 8px;"> </span><param name="allowscriptaccess" value="always" /><span style="font-size: 8px;"> </span><param name="src" value="http://www.youtube.com/v/U5O6KfiLVAA&amp;hl=en&amp;fs=1" /><span style="font-size: 8px;"> </span><param name="allowfullscreen" value="true" /><span style="font-size: 8px;"> </span></object>


Uite si validarea