Update README.md

Author: leonardomso

README.md

@@ -599,6 +599,7 @@ All the translations for this repo will be listed below:
  * 🎥 [Pure Functions — Hexlet](https://www.youtube.com/watch?v=dZ41D6LDSBg)
  * 🎥 [Pure Functions - Functional Programming in JavaScript — Paul McBride](https://www.youtube.com/watch?v=Jh_Uzqzz_wM)
  * 🎥 [JavaScript Pure Functions — Seth Alexander](https://www.youtube.com/watch?v=frT3H-eBmPc)
+ * 🎥 [JavaScript Pure vs Impure Functions Explained — Theodore Anderson](https://www.youtube.com/watch?v=AHbRVJzpB54)
 
 
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