Added a link to video in README.md (#4)

Author: MaryLynJuana

README.md

@@ -1,4 +1,5 @@
-# Wrapper
-Wrapper functions, Interface wrappers, etc.
+# Wrapper functions, Interface wrappers, etc.
+
+[![Примеси, обертки, декораторы, мемоизация ](https://img.youtube.com/vi/oRQ0kQr1N-U/0.jpg)](https://www.youtube.com/watch?v=oRQ0kQr1N-U)
 
 Task: rewrite wrapper function to have custom callbacks: `beforeCall, afterCall, beforeCallback, afterCallback` passed as parameters. Or implement wrapper using prototypes and/or classes.