fix typo

Author: beniroquai

docs/usage/disc/xiao-microscope/04_2_seeedmicroscopepcb.md

@@ -344,11 +344,19 @@ void loop() {
 
 The firmware is available here https://github.com/youseetoo/openuc2-seeed-xiaos3-microscopy-board
 
+![](./IMAGES/IMG_20260504_092458.jpg)
 
-<p><iframe width="560" height="315" src="https://www.youtube.com/embed/undefined" title="" frameBorder="0"   allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"  allowFullScreen><br>Powered by <a href="https://youtubeembedcode.com">how to get embed code from youtube</a> and <a href="https://xn--helgln-mua.com/">helglån.com</a></iframe></p>
-
+<div style={{position: 'relative', paddingBottom: '56.25%', height: 0, overflow: 'hidden'}}>
+  <iframe 
+    style={{position: 'absolute', top: 0, left: 0, width: '100%', height: '100%'}}
+    src="https://www.youtube.com/embed/2KflitRn_DY?si=HBx4nVdGbn25wCq9" 
+    title="YouTube video player" 
+    frameBorder="0" 
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" 
+    allowFullScreen
+  />
+</div>
 
-![](./IMAGES/IMG_20260504_092458.jpg)
 
 
 ## Troubleshoot