All three TVs are equipped with Apple TV. To use it, turn on the TV with the remote and press the next button on the remote. choose the Apple TV input.

Then, you can use the Apple TV remote: 

It allows you to access the following streaming services:  Netflix, Disney+, Canal+ and Amazon prime.

You can also access a library of fillms (Be careful, the computer must remain turned on if you want to use the mediacenter). To launch it, click the following Apple TV icon:

Then you can browse through the available movies from an interface similar to the following: 

The majority of the films are available in several languages. To select them, launch the movie of your choice. Then, on the track pad of the remote control perform a brief swipe down. A new menu should appear with the languages available in audio as well as subtitles.