diff --git a/src/element/Note.css b/src/element/Note.css
index a8f85450..c9549b45 100644
--- a/src/element/Note.css
+++ b/src/element/Note.css
@@ -32,12 +32,15 @@
 .note > .body img, .note > .body video, .note > .body iframe {
     max-width: 100%;
     max-height: 500px;
-    margin: 10px;
-    margin-left: auto;
-    margin-right: auto;
+    margin: 10px auto;
     display: block;
 }
 
+.note > .body iframe, note > .body video {
+    width: -webkit-fill-available;
+    aspect-ratio: 16 / 9;
+}
+
 .note > .header img:hover, .note > .header .name > .reply:hover, .note .body:hover {
     cursor: pointer;
 }