diff --git a/layouts/partials/seo.html b/layouts/partials/seo.html
index ee8aade..1ed1480 100644
--- a/layouts/partials/seo.html
+++ b/layouts/partials/seo.html
@@ -52,6 +52,13 @@
 <meta name="twitter:image:src" content="{{ $staticIcon }}" />
 {{- end -}}
 
+{{/*=== extra params? ===*/}}
+{{- with .Params.audio }}<meta property="og:audio" content="{{ . }}" />{{ end }}
+{{- with .Params.locale }}<meta property="og:locale" content="{{ . }}" />{{ end }}
+{{- with .Params.videos }}{{- range . }}
+<meta property="og:video" content="{{ . | absURL }}" />
+{{ end }}{{ end }}
+
 {{/*=== article ===*/}}
 {{ with or .Params.author .Site.Params.author -}}
 {{ "<!-- author -->" | safeHTML }}
@@ -72,7 +79,7 @@
 <meta property="article:section" content="{{ . }}" />
 {{- end -}}
 {{- with .Params.tags }}
-<meta property="article:tag" name="keywords" content='{{ delimit . " "}}' />
+<meta property="article:tag" itemprop="keywords" name="keywords" content='{{ delimit . " "}}' />
 {{- end -}}
 
 {{- if isset .Params "date" }}