To stream our videos from your phone to your TV there are several options depending on your available devices.
iPhone to Apple TV
This should work seamlessly once your phone is set to play on the TV.
iPhone to Chromecast
The best way to do this is to download the free Chromecast App from the App store. It’s not made by Google but it works well. Connect your TV and then you need to open the website from within the app. Open the app and click on the Web Videos box and navigate to the site from there.
Android to Chromecast
Use your Google Home app to connect your TV. Then you should see a Cast Screen option appear as a button in this app.