Add demo link

README.md

@@ -14,7 +14,6 @@
 ---
 # 👋 What is Nesis❓
 
-## Overview
 Nesis is an open-source enterprise knowledge discovery solution that connects to multitudes of datasources, collecting
 information and making it available in a conversation manner. Nesis leverages generative AI to aggregate document chunks
 collected from different documents in multiple formats such as pdf, docx, xlsx and turn them into meaning human-readable compositions. Allowing you to;
@@ -23,6 +22,10 @@ collected from different documents in multiple formats such as pdf, docx, xlsx a
 2. Conveniently view comparisons between documents.
 3. Summarise large documents.
 
+# Demo
+
+[![Nesis Demo](https://img.youtube.com/vi/TckJLflTVnk/0.jpg)](https://www.youtube.com/watch?v=TckJLflTVnk)
+
 ## 📜 Documentation
 Read the Nesis documentation [here](./docs/README.md)