I had a Kodi box (Raspberry Pi 2), but (I) was never very good with the interface. I have a friend that is more technical or spends the youtube time needed to understand it. It is a streaming system with everything you would want to watch. Kodi can also be used on your computer. I have to add, Kodi is open source and the leader moved on to the next greatest, this means the others who were keeping the system updated have slowed, because why spend time working for free on a system that will be overtaken with something better. It is still useful, but I expect an upgrade in the future.
I recently bought an Amazon Firestick, I got it on sale for $24.99. I did have to get Amazon Prime for $99 in order to get the Prime Video. It has loads of TV shows and Movies. It is easy to use, you can add other feeds, so far I have added Terrarium TV and Mobdro. You can even put Kodi on it.
If you don't mind a learning curve, google Kodi and see were it's at and look at a couple youtube videos about Kodi.