szurubooru/public_html/templates/post-content.tpl

<% var postContentUrl = '/data/posts/' + post.name + '?x=' + Math.random() /* reset gif animations */ %>

<div class="post-content post-type-<%= post.contentType %>">
	<div class="post-notes-target">
	</div>

	<%  if (post.contentType === 'image') { %>

		<div
				class="object-wrapper"
				data-width="<%= post.imageWidth %>"
				data-height="<%= post.imageWidth %>"
				style="max-width: <%= post.imageWidth %>px">
			<img alt="<%= post.name %>" src="<%= postContentUrl %>"/>
			<div class="padding-fix" style="padding-bottom: calc(100% * <%= post.imageHeight %> / <%= post.imageWidth %>)"></div>
		</div>

	<% } else if (post.contentType === 'youtube') { %>

		<div class="object-wrapper">
			<iframe src="//www.youtube.com/embed/<%= post.contentChecksum %>?wmode=opaque" allowfullscreen></iframe>
			<div class="padding-fix"></div>
		</div>

	<% } else if (post.contentType === 'flash') { %>

		<div class="object-wrapper">
			<object
					type="<%= post.contentMimeType %>"
					width="<%= post.imageWidth %>"
					height="<%= post.imageHeight %>"
					data="<%= postContentUrl %>">
				<param name="wmode" value="opaque"/>
				<param name="movie" value="<%= postContentUrl %>"/>
			</object>
		</div>

	<% } else if (post.contentType === 'video') { %>

		<div class="object-wrapper">
			<% if (post.flags.loop) { %>
				<video id="video" controls loop="loop">
			<% } else { %>
				<video id="video" controls>
			<% } %>

				<source type="<%= post.contentMimeType %>" src="<%= postContentUrl %>"/>

				Your browser doesn't support HTML5 videos.
			</video>
		</div>

	<% } else { console.log(new Error('Unknown post type')) } %>

</div>