📺 docs: add YouTube demo video link to README

Added YouTube demo link (https://youtu.be/2heXC3K13Dk) showcasing complete walkthrough of features, installation, and real-world usage examples.

Author: SanjeevSaniel

README.md

@@ -67,6 +67,10 @@ A powerful, universal website mirroring tool that intelligently detects and pres
 - Easy comparison between standard and AI-enhanced results
 - Professional project organization
 
+## 🎥 Demo Video
+
+Watch the tool in action: **[YouTube Demo](https://youtu.be/2heXC3K13Dk)** - Complete walkthrough of features, installation, and real-world usage examples.
+
 ## 🚀 Quick Start
 
 ### Installation Options