Roku is a displayer of all the channels you can install. Smart TVs have a displayer built in. Google Play is another displayer. It's like a big computer screen. You click on the channel you want and it opens up showing you all the shows that are available on that channel. Even the paid channels let you browse to see if you like it or not. Amazon Prime and Netflix are my two of choice. Hulu is a channel you can access through any displayer. You can get HBO, Starz, Showtime, etc on the displayers. All paid channels are by the month. No long term commitment. Cancel anytime.