docs: replace video links with embedded YouTube iframes

Author: kesku

docs/showcase/cycle-sync-ai.mdx

@@ -77,7 +77,14 @@ These are parsed and rendered as styled HTML inside the app using WebViews.
 
 ## Demo Video
 
-Watch the full app walkthrough here: https://www.youtube.com/watch?v=R558uRLNvUM&t=2s.
+<iframe
+  className="w-full aspect-video rounded-xl"
+  src="https://www.youtube.com/embed/R558uRLNvUM"
+  title="YouTube video player"
+  frameBorder="0"
+  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+  allowFullScreen
+></iframe>
 
 > *Note: The LLM takes ~30–60 seconds per request. This wait time was trimmed in the video for brevity.*
 

docs/showcase/flameguardai.mdx

@@ -11,7 +11,14 @@ keywords: [FlameGuardAI, MCP, External Fire ,AI Home Safety, Home Inspection]
 
 ### Demo
 
-[![Watch Live video](https://img.youtube.com/vi/EI5yT7_aD6U/0.jpg)](https://www.youtube.com/watch?v=EI5yT7_aD6U)
+<iframe
+  className="w-full aspect-video rounded-xl"
+  src="https://www.youtube.com/embed/EI5yT7_aD6U"
+  title="YouTube video player"
+  frameBorder="0"
+  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+  allowFullScreen
+></iframe>
 
 ### Try it out
 

docs/showcase/valetudo-ai.mdx

@@ -40,7 +40,14 @@ Valetudo AI integrates with [Perplexity Sonar Pro](https://docs.perplexity.ai),
 ## Demo Video
 
 See Valetudo AI in action:  
-[![Watch the demo](https://img.youtube.com/vi/AX3nOh9LbTc/0.jpg)](https://www.youtube.com/watch?v=AX3nOh9LbTc)
+<iframe
+  className="w-full aspect-video rounded-xl"
+  src="https://www.youtube.com/embed/AX3nOh9LbTc"
+  title="YouTube video player"
+  frameBorder="0"
+  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
+  allowFullScreen
+></iframe>
 
 ## Screenshots