If you have a Chromecast, casting to your TV is simple. Change your TV’s input to the HDMI input containing the Chromecast. Most major music and video streaming services, as well as some games and utility apps, have a built-in Cast button. Click the Cast button to make the content appear on your TV. If the app you’re using doesn’t have a built-in Cast button, you can mirror your device through your Google Home app.