diff --git a/README.md b/README.md
index 62eda2d..6c01d38 100644
--- a/README.md
+++ b/README.md
@@ -45,5 +45,5 @@ Provide [TII TLS 1.3](https://tls13.io) negotiating protocol logs, store, make t
 
 [Test OpenSSL demo video](cap/tls_test_openssl.mp4)
 
-<video with="800" height="400" src="cap/tls_test_openssl.mp4" controls></video>
+<video with="1200" height="600" src="cap/tls_test_openssl.mp4" controls></video>