Lightbox called directly from JavaScript on page load.
<button class="play-5">Click to re-open</button>
<script>
// with a button to re-open it later
$('.play-5').yu2fvl({ open: true });
// just to open once, no element linked to it
// if you open it directly with no element linked to it
// the "vid" parameter is required
$.yu2fvl({ vid: "AbTUw7aTITg", open: true });
</script>