If you want to cast videos from your iPhone or iPad to your Vizio smart TV, you will need an adapter and an Apple TV. If you have an Apple television, you can install the SmartCast app in the App Store. You will then be able to connect your iPhone or iPad to the Vizio. After you set up the app, you should be able to watch videos on your Vizio smart TV.

If you use an Android phone or a Windows phone, you can also cast content from your mobile phone to your Vizio. You must download the app and install the required software to connect your smartphone or tablet to your TV. Once you have installed the software, you will need to purchase a premium Plex Pass, which unlocks advanced features. Once you have registered, you can view all of your Plex content on your smart TV.

For iOS devices, you will need to download the SmartCast Mobile app from the Apple App Store or Google Play. It will connect your mobile device to your Vizio smart TV, so you won't need to switch apps. The app also allows you to connect your Apple Watch to your Vizio smart TV with Siri. If you have a Vizio smart TV, you can use the SmartCast Mobile app to cast videos from your phone to your Vizio TV.