View file phpbb/mediaembed/styles/all/template/event/overall_header_stylesheets_after.html

{% if S_MEDIA_EMBED_FULL_WIDTH or S_MEDIA_EMBED_MAX_WIDTHS %}
<style>
{% if S_MEDIA_EMBED_FULL_WIDTH %}
	[data-s9e-mediaembed] { max-width: 100% !important; }
{% endif %}
{% for item in S_MEDIA_EMBED_MAX_WIDTHS %}
	[data-s9e-mediaembed="{{ item.site }}"] { max-width: {{ item.width }} !important; }
{% endfor %}
</style>
{% endif %}