I want to integrate with the Chromecast Developer API so I want my chromecast(being shipped) whitelisted but you are supposed to supply 2 URLs. What exactly are these for? I might just be confused about how it works. Thanks.
EDIT:
I found this source to be a good example to demonstrate how to use it. The HTML in the receiver is what you would have the white listed URL pointing to.
A Receiver is a HTML5 application (HTML/JS/CSS3) that runs on the Chromecast device. Your Sender application must send an APP ID to the device, which then looks up the app in a table and loads your page for you. You then use the App ID in your Receiver (on the Chromecast device) to open a connection to your Sender.
We ask you to provide one or two URL's. We expect that you'll want to have a development URL, and eventually a production one. You only need to provide one.