You want to insert a playable youtube video in your email? It's not an easy thing to do. So first,
read this article to better understand why?
​ http://smallbusiness.chron.com/put-youtube-video-email-43689.html
​
You can do it with several steps, but it won't play inside the email.
​ http://www.youtube.com/watch?v=wunGNzrhXmY
​