PortableInfobox/templates/PortableInfoboxItemMediaCollection.hbs

<div class="pi-image-collection">
	<ul class="pi-image-collection-tabs">
		{{#each images}}<li class="pi-tab-link pi-item-spacing{{#if isFirst}} current{{/if}}" data-pi-tab="pi-tab-{{ref}}">{{{caption}}}</li>{{/each}}
	</ul>
	{{#each images}}
		<div class="pi-image-collection-tab-content{{#if isFirst}} current{{/if}}" id="pi-tab-{{ref}}">
			<figure class="pi-item pi-image{{#if isVideo}} pi-video{{/if}}">
				<a href="{{url}}" class="image image-thumbnail{{#if isVideo}} video video-thumbnail{{/if}}" title="{{alt}}">
					{{#if isImage}}<img src="{{thumbnail}}" srcset="{{thumbnail}} 1x, {{thumbnail2x}} 2x" class="pi-image-thumbnail" alt="{{alt}}" width="{{{width}}}" height="{{{height}}}"/>
					{{else}}{{#if isVideo}}<video src="{{url}}" class="pi-video-player" controls="true" controlsList="nodownload" preload="metadata">{{alt}}</video>
					{{else}}{{#if isAudio}}<audio src="{{url}}" class="pi-audio-player" controls="true" controlsList="nodownload">{{alt}}</audio>
					{{else}}{{alt}}{{/if}}{{/if}}{{/if}}
				</a>
			</figure>
		</div>
	{{/each}}
</div>