Update readme.txt

Author: harshitarora-in

readme.txt

@@ -44,7 +44,7 @@ You'll be free to concentrate on other aspects of your site with Optimole's set
 So, if you have been looking for one plugin that provides lazy loading with a CDN and perfectly sized images, then Optimole is perfect for you.
 
 ### Checkout a quick overview of Optimole plugin
-https://youtu.be/nR9iGNJFxnE
+https://youtu.be/siCm0fhNes0
 
 ### How does it do all these great things?