https://armeewettkampf.ch/userfiles/modules/microweber/api/background_videos.js

1const renderBgVideos = function() {
2
3    function rend(root) {
4        Array.from(root.querySelectorAll('[data-mwvideo]')).forEach(function(node){
5            var url = node.dataset.mwvideo.trim();
6            node.innerHTML = `<video src="${url}" autoplay muted loop playsinline></video>`;
7        });
8    }
9
10    rend(document);
11
12    const frame = document.querySelector('#live-editor-frame');
13    if(frame && frame.contentDocument) {
14        rend(frame.contentDocument);
15    }
16
17}
18
19renderBgVideos();
20
21addEventListener('DOMContentLoaded', e => renderBgVideos());
22addEventListener('load', e => renderBgVideos());