adding thumbnail

README.md

@@ -17,23 +17,18 @@ Realtime AI Speech powered by OpenAI Realtime API, ESP32, Secure WebSockets, and
 
 ## 📽️ Demo Video
 
-<div align="center" style="position:relative; width:80%; max-width:560px; margin:0 auto;">
-  <a href="https://www.youtube.com/watch?v=o1eIAwVll5I" target="_blank">
+<div align="center">
+    <a href="https://www.youtube.com/watch?v=o1eIAwVll5I" target="_blank">
     <img src="https://img.youtube.com/vi/o1eIAwVll5I/maxresdefault.jpg" alt="Elato AI Demo Video" width="100%" style="border-radius:10px" />
-    <div style="position:absolute; top:50%; left:50%; transform:translate(-50%, -50%);">
-      <img src="https://upload.wikimedia.org/wikipedia/commons/thumb/0/09/YouTube_full-color_icon_%282017%29.svg/120px-YouTube_full-color_icon_%282017%29.svg.png" width="60" alt="Play Video" />
-    </div>
   </a>
-  <h3>
+<h3>
 
 [Homepage](https://elatoai.com/) | [Buy AI device](https://www.elatoai.com/products) | [Buy AI Dev Kit](https://www.elatoai.com/products/ai-devkit)
 
 </h3>
+
 </div>
 
-
-<!-- </div> -->
-
 ## ⚡️ DIY Hardware Design
 
 <img src="assets/pcb-design.png" alt="Hardware Setup" width="100%">