LG Cast is an additional feature provided by Connect SDK's WebOS TV Service.
With Connect SDK integrated in the mobile app, it can cast the screen and sound into the TV screen. This allows you to extend the screen of a mobile app to a larger TV screen and share it with your family.
With Connect SDK integrated in the mobile app, it can display camera preview on the TV screen. This allows you to use your mobile device’s camera as a remote camera for the TV that does not have an internal or USB camera.