I know that we can autoplay the embed youtube video by adding the 'autoplay=1' parameter,
so if the embed link is like this
<iframe width="420" height="315" src="//www.youtube.com/embed/sorpTOyJXf8" frameborder="0" allowfullscreen></iframe>
then the with autoplay would look like this
<iframe width="420" height="315" src="//www.youtube.com/embed/sorpTOyJXf8?autoplay=1" frameborder="0" allowfullscreen></iframe>
but my concern is I have embedded quite a few youtube links in my site, it woulb be tedious to update the code one by one within the CMS, is there a javascript function that will enable youtube to autoplay globally?