http://www.tools4noobs.com/online_tools/youtube_xhtml/

OR

You tube has removed its old embedding code options for video to insert it to PowerPoint. please follow this step to insert the video in PowerPoint.

Here is a workaround to embed the youtube videos in PowerPoint.

 

 

<object width="560" height="315"><param name="movie" value="http://www.youtube.com/v/NUjbKaUcxeA?version=3&amp;hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/NUjbKaUcxeA?version=3&amp;hl=en_US" type="application/x-shockwave-flash" width="560" height="315" allowscriptaccess="always" allowfullscreen="true"></embed></object>

 

The bits highlighted in italics are the width and height which you can adjust as you wish. The bits in bold are the 11-character video ID: simply replace that part with the video ID of the video you want to embed.

 

The video ID can be found in the URL, which you can get from your browser's address bar when you're looking at the video on its own page

To make it Autoplay,  add after the ?   autoplay=1;