added Array video link from Harvard University

Arrays explained in this video can be very helpful for beginners.

README.md

@@ -608,6 +608,7 @@ if you can identify the runtime complexity of different algorithms. It's a super
 
 - ### Arrays
     - [ ] About Arrays:
+    	- [Arrays CS50 Harvard University](https://youtu.be/tI_tIZFyKBw)
         - [Arrays (video)](https://www.coursera.org/lecture/data-structures/arrays-OsBSF)
         - [UC Berkeley CS61B - Linear and Multi-Dim Arrays (video)](https://archive.org/details/ucberkeley_webcast_Wp8oiO_CZZE) (Start watching from 15m 32s)
         - [Dynamic Arrays (video)](https://www.coursera.org/lecture/data-structures/dynamic-arrays-EwbnV)