Rocket.Chat/app/oembed/client/oembedImageWidget.html

<template name="oembedImageWidget">
	{{#if parsedUrl}}
		{{#if collapsed}}
			<span class="collapse-switch icon-right-dir" data-index="{{index}}" data-collapsed="{{collapsed}}"></span>
		{{else}}
			<span class="collapse-switch icon-down-dir" data-index="{{index}}" data-collapsed="{{collapsed}}"></span>
			{{#if loadImage}}
				<figure>
					<div class="inline-image" style="background-image: url('{{url}}');">
						<img src="{{url}}" rel="noopener noreferrer" height="200" class="gallery-item">
					</div>
				</figure>
			{{else}}
				<div class="image-to-download" data-url="{{url}}">
					<i class="icon-picture"></i>
					<div>click to load</div>
				</div>
			{{/if}}
		{{/if}}
	{{/if}}
</template>