How to Add a Featured Video?

Hi everyone! I am new to Hugo. My question is how can I get my videos to display in my excerpts? My theme is: amnix: I have youtube videos in my every post but they are not displayed on the index page. I guess I need to add something like | safeHTML ? Am i right?

Thank you in advance!

{{- with .Summary  }} 
<div class="post__content">{{ .  }} </div>
{{- end }}

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