Variable "youtube_id" does not exist.
<div class="min-h-32">
{% set lastVideo = site.find("videos").grandchildren().sortBy('date', 'desc').paginate(1).first() %}
{# {{dump(lastVideo)}} #}
{% if 'facebook' in lastVideo.video_url.toString %}
<div id="mainvideo" class="fb-video h-64" data-href="{{lastVideo.video_url}}" data-show-text="false" data-width=""></div>
{% else %}
<iframe width="100%" height="500" src="https://www.youtube.com/embed/{{youtube_id}}" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
{% endif %}
</div>
</div>
<div class="col-span-3">
<div class="bg-brand-light py-8 h-full text-center p-5 flex items-center justify-center flex-col">
<h3 class="leading-tight m-0">{{site.join_us_facebook_title}}</h3>