Layerslider Youtube video autoplay issue

Hi everybody,
I have 2 youtube videos inserted in my website with the iframe code.
One on this page
The code inserted is :
<iframe id="ytplayer" type="text/html" width="560" height="315" src="//www.youtube.com/embed/jIC0dHjwtDw?rel=0&autoplay=0" frameborder="0" allowfullscreen></iframe>
It’s work correctly the video don’t start automatically.
The second video is inserted in the home
The code inserted is :
<iframe id="ytplayer" type="text/html" width="560" height="315" src="//www.youtube.com/embed/HFew6KXUsX0?rel=0&autoplay=0" frameborder="0" allowfullscreen></iframe>
But the video start playing automatically.It is inserted in the layerslider.
Both codes are identic, the only thing different is the id of the video. I don’t understand why it’s work fine outside the layerslider an why it doesn’t inside the layerslider.
Could you help me to fix it please?
Thank you!
Pascal