Updated video thumbnail to reflect latest changes

Author: adeelraza

README.md

@@ -4,7 +4,7 @@ The excellent drag-n-drop email editor by [Unlayer](https://unlayer.com) as a [V
 
 Video Overview |
 :---: |
-[![Vue Email Editor](https://s3.amazonaws.com/unroll-assets/unrollyoutube.png)](https://www.youtube.com/watch?v=MIWhX-NF3j8) |
+[![Vue Email Editor](https://unroll-assets.s3.amazonaws.com/unlayervideotour.png)](https://www.youtube.com/watch?v=MIWhX-NF3j8) |
 *Watch video overview: https://youtu.be/MIWhX-NF3j8* |
 
 ## Live Demo