Wistia Video continues to load on iPhone 6

Question

I am using wistia to render videos in mysite. I have done it. The video plays on all devices except the iPhone (it continues to load). Can anyone help solve this problem.

My code is:

<script charset="ISO-8859-1" src="//fast.wistia.com/assets/external/E-v1.js" async></script>

<div class="wistia_embed wistia_async_815evvnu4k" style="height:360px;">&nbsp;</div>