diff --git a/routes.go b/routes.go
index 937084c..2f6977d 100644
--- a/routes.go
+++ b/routes.go
@@ -123,6 +123,13 @@ var funcMap = template.FuncMap{
 		}
 		return false
 	},
+	"isYoutube": func(u string) bool {
+		re := regexp.MustCompile(`^((?:https?:)?\/\/)?((?:www|m)\.)?((?:youtube(-nocookie)?\.com|youtu.be))(\/(?:[\w\-]+\?v=|embed\/|live\/|v\/)?)([\w\-]+)(\S+)?$`)
+		if re.MatchString(u) {
+			return true
+		}
+		return false
+	},
 	"thumbnail": func(p lemmy.Post) string {
 		if p.ThumbnailURL.IsValid() {
 			return p.ThumbnailURL.String() + "?format=jpg&thumbnail=96"
diff --git a/templates/post.html b/templates/post.html
index 5add8e3..b3f65b4 100644
--- a/templates/post.html
+++ b/templates/post.html
@@ -41,7 +41,7 @@
             </a>
             ({{ domain . }})
           </div>
-          <div class="expando-button{{ if and (not (and .Post.Body.IsValid .Post.Body.String )) (not (isImage .Post.URL.String)) }} hidden{{else if eq .Rank 0}} open{{ end }}"></div>
+          <div class="expando-button{{ if and (not (and .Post.Body.IsValid .Post.Body.String )) (not (isImage .Post.URL.String)) (not (isYoutube .Post.URL.String)) }} hidden{{else if eq .Rank 0}} open{{ end }}"></div>
           <div class="meta">
             submitted
             <span title="{{.Post.Published.Time}}">{{ humanize .Post.Published.Time -}}</span>