Trying to use this sample app provided by Google: https://github.com/googlecast/CastHelloVideo-ios
It is not asking to connect with my Chromecast, or even scanning for receiver devices. There is only the "Cast Video" button that alerts "Not Connected - Please connect to Cast device" when clicked. I understand there is a whitelisting/registration process for styled and custom media receiver apps, but there is supposed to be a default media receiver app built into the Chromecast that I should be able to use right away. How can I make it scan for devices?