When your are using Google Cast, you don't stream from your device to the TV/Chromecast. Your device sends a package containing the app name you want to open and some basic configuration data and then the TV/Chromecast downloads a web app from Google's severs and opens it with the configuration you provided. Then your device can interact with it.
When your are using Google Cast, you don't stream from your device to the TV/Chromecast. Your device sends a package containing the app name you want to open and some basic configuration data and then the TV/Chromecast downloads a web app from Google's severs and opens it with the configuration you provided. Then your device can interact with it.