From David East's youtube tutorial. You can see a live version of the application here: https://angularfiredemo-575a1.firebaseapp.com/
In order for this demo to work, you need to have your database set up with this structure:
your-firebase-application
|
+-angular
|
+-object
|
+-name: "David"
When David does the demo, he is already inside of his angular
node, which could be confusing if you aren't paying close attention. Make sure to put your object inside of that angular
node.