Rocket.Chat/packages/rocketchat-oembed/client/oembedFrameWidget.html

<template name="oembedFrameWidget">
{{#if parsedUrl}}
	<blockquote class="background-transparent-darker-before">
		{{#if meta.oembedProviderName}}
			{{#if meta.oembedProviderUrl}}
				<a href="{{meta.oembedProviderUrl}}" target="_blank" style="color: #9e9ea6">{{meta.oembedProviderName}}</a>
			{{/if}}
		{{/if}}
		{{#if meta.oembedAuthorName}}
			{{#if meta.oembedAuthorUrl}}
				<br class="only-after-a"/>
				<a href="{{meta.oembedAuthorUrl}}" target="_blank">{{meta.oembedAuthorName}}</a>
			{{/if}}
		{{/if}}
		{{#if meta.oembedTitle}}
			{{#if meta.oembedUrl}}
				<br class="only-after-a"/>
				<a href="{{meta.oembedUrl}}" target="_blank">{{meta.oembedTitle}}</a>
			{{/if}}
		{{/if}}
		{{#if collapsed}}
			<span class="collapse-switch icon-right-dir" data-index="{{index}}" data-collapsed="{{collapsed}}"></span><br/>
		{{else}}
			<span class="collapse-switch icon-down-dir" data-index="{{index}}" data-collapsed="{{collapsed}}"></span><br/>
			{{#if meta.oembedDescription}}
				<p>{{meta.oembedDescription}}</p>
			{{/if}}
			{{{meta.oembedHtml}}}
		{{/if}}
	</blockquote>
{{/if}}
</template>