diff --git a/static/css/style.css b/static/css/style.css
index 4ceccff..8cf434b 100644
--- a/static/css/style.css
+++ b/static/css/style.css
@@ -1516,6 +1516,7 @@ form .post {
 
 .post .attachments video {
     max-width: 100%;
+    aspect-ratio: 16/9;
 }
 
 .post .attachments .other {