Add the following preceded by a & after video URL:

~ For autoplay: Add autoplay=1 or autoplay=true
~ For looping: Add loop=1 or loop=true

Note: both could be added.

Examples

<object width=”480″ height=”385″><param name=”movie” value=”http://www.youtube.com/p/90C68D73786C56E3″ /><embed src=”http://www.youtube.com/p/90C68D73786C56E3&autoplay=1&loop=1&fmt=18″ type=”application/x-shockwave-flash” width=”480″ height=”385″></embed></object>