youtube.html

<script src="/assets/ytdefer.min.js"></script>

<div style="margin:auto;width:380px;height:250px;max-width:95%;" class="ytdefer" data-alt="some-alt-text-here" data-title="some-alt-text-here" data-src="{{ include.id }}"></div>

<script>
window.addEventListener('load', ytdefer_setup);
</script>