Download the WorldStream app from the app store on your Samsung TV, LG TV, Android TV, Google TV, Roku, Apple TV, Amazon Fire TV Stick or VIDAA TV (Hisense, Toshiba and other VIDAA OS models). Then just sign in with your email and password and start watching.
You can also cast from your phone or tablet to the TV using Chromecast or AirPlay.
If you can't find the app, make sure your TV's software is up to date.