By Forrest Smith - Drempd.com
On an iphone you need to add a 'playsinline' parameter. I think it works by placing it either in the javascript, or as part of the HTML tag -- I just added it to both to be safe, and it resolved the issue so I called it good.
In javascript as part of the getUserMedia function:
let stream = await navigator.mediaDevices.getUserMedia({
video: {
facingMode: 'environment',
playsinline: true
},
audio: false
});
Just in the HTML
<video id="video" style="width: 100%; height: 100%;" autoplay playsinline></video>