テスト
<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/YV91AZupPM8"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/YV91AZupPM8 " type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>