On your mobile device or tablet, you will need to download the Google Home app. You can do this by searching for this in your App/Play Store.
To set up Chromecast on your mobile device or tablet, follow the steps below:
Playing TVNZ OnDemand via Chromecast:
Step 1: Plug in your Chromecast device
Plug one end of the USB power cable into your Chromecast (A) and the other end into any open HDMI input on your TV (B). Plug the power supply into an open outlet (C).
Step 2: Double check that the Chromecast and the mobile device, tablet or Chrome browser you are using to set up Chromecast are both on the same Wi-Fi network.
Step 3: Turn your TV channel to the HDMI channel that your Chromecast is connected to and follow the instructions on the screen.
Step 4: On your device, select the Chromecast icon in the top right corner of the TVNZ OnDemand app, website, or player and connect to the Chromecast.