diff --git a/previewers/betatest/css/preview.css b/previewers/betatest/css/preview.css
index 9c2ec37..7be0bf8 100644
--- a/previewers/betatest/css/preview.css
+++ b/previewers/betatest/css/preview.css
@@ -204,4 +204,9 @@ This has been done for the Rich Html Previewer, which also has the reverse issue
     max-height: 500px;
     word-break: break-all;
     overflow-y: auto;
+}
+
+.preview video{
+    max-width: 100%;
+    max-height: 100%;
 }
\ No newline at end of file