melolimo on "Youtube video embed address didn't work"

Hello all,

I am pretty new to WP. Yesterday I tried embedding this Youtube video into my blogpost.

<object width="660" height="525"><param name="movie" value="http://www.youtube.com/v/5PzL8aL6jtI?fs=1&hl=en_GB&border=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/5PzL8aL6jtI?fs=1&hl=en_GB&border=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="660" height="525"></embed></object>

however, when it was published, the video did not appear and the embed address that appeared on my blog is

src=”http://www.youtube.com/v/5PzL8aL6jtI?fs=1&hl=en_GB&border=1″ type=”application/x-shockwave-flash” allowscriptaccess=”always” allowfullscreen=”true” width=”660″ height=”525″>

I do not understand why this happened and what can be done to correct this?

Thanks so much for all your replies.