https://xn----7sbab9bumiw.xn--p1ai/templates/prana/widgets/html/video.js?35442

1function initLazyVideos() {
2    const videos = document.querySelectorAll('.lazy-video');
3    const observer = new IntersectionObserver((entries) => {
4        entries.forEach(entry => {
5            if (entry.isIntersecting) {
6                loadVideo(entry.target);
7                observer.unobserve(entry.target);
8            }
9        });
10    }, { rootMargin: '50px' });
11    videos.forEach(video => observer.observe(video));
12}
13function loadVideo(video) {
14    video.querySelectorAll('source').forEach(source => {
15        source.src = source.dataset.src;
16    });
17    video.load();
18    video.addEventListener('loadeddata', () => {
19        video.classList.add('loaded');
20        video.play().catch(e => {
21        });
22    });
23}
24document.addEventListener('DOMContentLoaded', initLazyVideos);