To make an embedded video autoplay, add “
&autoplay=1” to the video’s embed code, right after the video ID (the series of letters that follows “v/”).
Here’s an example:
<object height="350" width="425"><param name="movie" value="http://www.youtube.com/v/OdT9z-JjtJk&autoplay=1" /><embed height="350" src="http://www.youtube.com/v/OdT9z-JjtJk&autoplay=1" type="application/x-shockwave-flash" width="425"></embed></object>
"