Here is a simplified way to make your Youtube videos start automatically i.e, To autoplay youtube videos.Though Youtube has discussed the method to autoplay videos by inserting “autoplay” word in the embed url but sometimes it just doesn’t work because of the different video embed url.
Here is the video from a Youtube user who has clearly explained on how to make autoplay videos and embed them into social networks such as Myspace :
From the video – Copy the Youtube Video embed code and paste it into Wordpad or notepad, tweak the code and add “autoplay” inbetween “rel” and “=1”
Paste the new autoplay video code anywhere in your Myspace profile or any website and you are done! Unfortunately Orkut.com doesn’t support autoplay of Youtube videos as they allow usage of the youtube video url, not the embed code!
Let’s take an example by copying the Embed code of the youtube video..
<object width=”425″ height=”344″><param name=”movie” value=”http://www.youtube.com/v/iDFMH6ztBx8&hl=en&fs=1″></param><param name=”allowFullScreen” value=”true”></param><param name=”allowscriptaccess” value=”always”></param> <embed src=”http://www.youtube.com/v/iDFMH6ztBx8&hl=en&fs=1” type=”application/x-shockwave-flash” allowscriptaccess=”always” allowfullscreen=”true” width=”425″ height=”344″></embed></object>
If you compare the video and the above code then you will see the word “rel” is missing (Instead we have “fs”) So replace “fs” by “rel” and make sure “&” is appended correctly. And the new Youtube code which has autoplay enabled :
<embed src=”http://www.youtube.com/v/iDFMH6ztBx8&hl=en&rel&autoplay=1” type=”application/x-shockwave-flash” allowscriptaccess=”always” allowfullscreen=”true” width=”425″ height=”344″></embed></object>
Try this, it works perfectly 
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Try this, it works perfectly,
thnk u very much ,i found what i was looking
LoL