feat: add screencast link in README

Author: taghizadlaura

README.md

@@ -46,7 +46,7 @@ Our website is organized as a scrollytelling experience exploring several dimens
 
 ## Screen cast
 
-
+Have a look at ou [screencast](https://youtu.be/ow9zDZU0r-M).
 
 ## Authors
 
@@ -83,4 +83,4 @@ To run the website locally:
 ```bash
 cd DataRizz/website
 python -m http.server 8080
-```
+```