Video Thumbnail on iPhone

Hi – Im having issues getting a video thumbnail to appear on iPhone. I have tried using the poster image short code, but that didn’t seem to do anything.

Please advise on how to solve this.

This is what the code currently looks like:

[evp_embed_video url=”https://seantsmith.co/wp-content/uploads/video files/Olay Oasis.mp4″ muted=”true” template=”none”

poster=""]

<div id=”gtx-trans” style=”position: absolute; left: 325px; top: 61.6667px;”>
<div class=”gtx-trans-icon”> </div>
</div>

The page I need help with: [log in to see the link]