docs: add video about FF (#102)

* docs: add video about FF

* Update README.md

* docs: learn _more_

Author: grant

README.md

@@ -29,6 +29,8 @@ curl http://my-url
 All without needing to worry about writing an HTTP server or complicated request
 handling logic.
 
+> Watch [this video](https://youtu.be/yMEcyAkTliU?t=912) to learn more about the Node Functions Framework.
+
 # Features
 
 *   Spin up a local development server for quick testing