Update README.md

aarav-tech · web-flow · commit d8a38f735d86 · 2020-11-21T09:55:40.000+05:30
Videos' links are added to README file
diff --git a/README.md b/README.md
@@ -4,15 +4,19 @@
 - Python3.6+
 
 ## Design Patterns
+
+### Introduction
+- What is design patterns? To understand watch this video - https://youtu.be/3GoiinBUwCU
+
 ### Creational Design Patterns
-- SignleTon
-- Factory
+- SignleTon - https://youtu.be/wElVjMlYVAw
+- Factory - https://youtu.be/4McdC4EtXKw
   - Simple Factory
   - Factory method
   - Abstract factory
-- Facade
+- Facade - https://youtu.be/tGK0pIbJYYg
 
 ### Behavioural Design Patterns
-- Command
-- Observer
-- Proxy
+- Command - https://youtu.be/Z7vHUey-fb8
+- Observer - https://youtu.be/H5kxgh8z0oo
+- Proxy - https://youtu.be/3A-G35mQqZo
