Add intro video to Readme

Author: jeremylevy

README.md

@@ -15,7 +15,9 @@ recode aws start recode-sh/workspace --instance-type t2.medium
   ... see the <a href="https://github.com/recode-sh/workspace">recode-sh/workspace</a> repository for an example of development environment configuration
 </blockquote>
 
-![vscode](assets/vscode.png)
+
+https://user-images.githubusercontent.com/1233275/171618947-147053d2-0613-43ab-9b88-3cc0b8d99ace.mp4
+
 
 ## Table of contents
 - [Requirements](#requirements)