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

<template name="oembedUrlWidget">
	{{#if show}}
		<blockquote class="message-oembed background-transparent-darker-before">
			<div style="{{#if image}}min-height: 80px;{{/if}} padding: 10px 3px;">
				{{#if image}}
					{{#if meta.ogImageUserGenerated}}
						<div>
							<a href="{{url}}" rel="noopener noreferrer" target="{{target}}">
								{{#if meta.ogImage}}
									<img src="{{meta.ogImage}}" rel="noopener noreferrer" height="200" />
								{{else}}
									<img src="{{image}}" rel="noopener noreferrer" height="200" />
								{{/if}}
							</a>
						</div>
					{{else}}
						<a href="{{url}}" rel="noopener noreferrer" target="{{target}}">
							<img src="{{image}}" rel="noopener noreferrer" height="60" align="left" style="margin-right: 10px;"/>
						</a>
					{{/if}}
				{{/if}}
				<div style="color: #AAA;">{{parsedUrl.host}}</div>
				{{#if title}}
					<div>
						<a href="{{url}}" rel="noopener noreferrer" target="{{target}}"><strong>{{{title}}}</strong></a>
					</div>
				{{/if}}
				<div style="overflow:hidden;white-space:nowrap;text-overflow:ellipsis">{{{description}}}</div>
			</div>
		</blockquote>
	{{/if}}
</template>