We have several Roku sticks. One Roku StreamBar for my office TV. I don't know if you've noticed but the new flat screen TVs chintz on the speakers and have them pointing at the wall. Makes it hard to hear for some like me. The StreamBar is a Roku built into the sound bar and works seamlessly. I think they are on sale at Amazon for $69. You just need a 10 meg or so, Internet connection and you should have minimal buffering issues. Connect the ROKU to your WiFi and you are set. You can watch pretty much everything with a subscription to the service that has what you want to watch. Prices vary from free to $25 ish / month. YouTube is free if you don't mind commercials. Commercial free YouTube is about $12 / month now.  Most services have a week free trial so you can sample them and see if you want to keep paying. A Roku account makes it easy to subscribe to all the other services, without needing to give your CC number to every provider.