My video (bottom page d4tm.org/confidence) appears with a slash through the play control on iOS devices. Tested with both iPhone and iPad. Tested fine in Chrome, Mozilla and Edge on PC and Chrome on phone.

Thanks. This is definitely an iOS problem. I temporality disabled AllVideos and put in a simple video tag and source which exhibited the same playback problem on my iPad. Feel free to close the topic. I've seen other references to the problem so if I find a solution, I'll reopen it and provide it for others.

BTW, the missing </video> tag was from my original video code being turned into two, one at entered size (750 x394) and one using the plugins default size (600x450). The default plugin was closed with </video> but the original code was closed after at the second one.
Original:
<div class="avPlayerWrapper avVideo">
<div class="avPlayerContainer">
<div id="AVPlayerID_1" class="avPlayerBlock">
<video class="avPlayer" style="width:750;height:394px;" src="/images/videos/confidence-750-394_1.mp4" preload="metadata" autoplay="" loop="" controls="" controlslist="nodownload" muted="">{mp4}confidence-750-394_1{/mp4}
</video>
</div>
</div>
</div>
Code created:
<div class="avPlayerWrapper avVideo">
<div class="avPlayerContainer">
<div id="AVPlayerID_1" class="avPlayerBlock">
<video class="avPlayer" style="width:750;height:394px;" src="/images/videos/confidence-750-394_1.mp4" preload="metadata" autoplay="" loop="" controls="" controlslist="nodownload" muted="">

<div class="avPlayerWrapper avVideo">
<div class="avPlayerContainer">
<div id="AVPlayerID_0_b96a67a16cd917cbd68d9b7ec0fb14c3" class="avPlayerBlock">
<video class="avPlayer" style="width:600px;height:450px;" src="/images/videos/confidence-750-394_1.mp4" preload="metadata" controls controlsList="nodownload"></video> </div>
</div>
</div>
</video>
</div>