Change the Chromecast's settings to match the television you want to cast to. Just connect it to your WiFi network. Connect your smartphone to the same WiFi network in order to establish a connection. Download and install the BBC.com/account/tv  iPlayer app on your smartphone (iOS/Android). Just click "Login" while utilising your service provider. Now, you can see the cast icon in the top-right corner. Choose Cast from the menu.choose your Chromecast device. Start taking pleasure in the BBC iPlayer content you want to watch on TV. Your your connection is successful.