add wmode=transparent to the you tube embed url.
change:
<embed height="390" src="http://www.youtube.com/v/Ubqc7_MnBeE?version=3&autoplay=0" type="application/x-shockwave-flash" width="610">
to:
<embed height="390" src="http://www.youtube.com/v/Ubqc7_MnBeE?version=3&autoplay=0&wmode=transparent" type="application/x-shockwave-flash" width="610">