chamilo-lms2/main/template/default/auth/modal_description.html.twig

{% autoescape false %}
    <div class="popup-course">
        {% set video = '' %}
        {% for item in data.extrafield %}
            {% if item.text == 'VideoUrl' %}
                {% set video = item.value %}
            {% endif %}
        {% endfor %}

        {% if video %}
        <div class="popup-video">
            <div class="embed-responsive embed-responsive-16by9">
                {{ essence.replace(video) }}
            </div>
        </div>
            {% endif %}
        <div class="popup-content">
            <h2 class="title">{{ data.description.title }}</h2>
            {{ data.description.content }}
        </div>
    </div>
{% endautoescape %}