Autoplay video animations on High Sierra Safari

I've seen the posts from people complaining that their sites with video/audio are being blocked from autoplay. This is not that.


Mine is a very simple problem. I have videos (without audio) that are showing screen animations from our apps. The videos have the muted tag set. They also don't have an audio track. Here is the code from the site. You can see the full page at: www.chekrite.com/features


  <video muted width="100%" preload="auto" loop playsinline autoplay>
      <source src="https://cdn2.hubspot.net/hubfs/2619113/Videos/Sign-in.mp4?t=1508887318769" type="video/mp4">
  </video>


As far as I can see, I have done everything required to get this video to autoplay. It works fine in Chrome and other browsers but does not work in Mobile Safari or Safari 11 on High Sierra.


Appreciate any clues from someone as to how to get this to work. Is this a bug in Safari on High Sierra?


OS: 10.13 (17A405)

Safari: 11.0 (13604.1.38.1.6)