diff --git a/README.md b/README.md
index dea329b..6ddcd37 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Realtime AI Speech powered by OpenAI Realtime API, ESP32, Secure WebSockets, and
 
 <div align="center">
   <a href="https://www.youtube.com/watch?v=o1eIAwVll5I" target="_blank">
-    <img src="https://img.youtube.com/vi/o1eIAwVll5I/0.jpg" alt="Elato AI Demo Video" width="560" height="315"  />
+    <img src="https://img.youtube.com/vi/o1eIAwVll5I/maxresdefault.jpg" alt="Elato AI Demo Video" width="100%" />
   </a>