I'm using Apple TV software on my Samsung smart TV but I can't watch any iTunes extra on movies I know that have that function

If you can't view your iTunes Extras - Apple Support

“iTunes Extras aren't available in the Apple TV app on smart TVs and streaming devices.”

First you connect the Apple TV and Samsung smart TV with same internet.then start playing iTunes movie on Apple TV , on the mirroring screen you can choose Apple TV to start mirroring. After that the movie stop on Apple TV and show on Samsung smart TV.

Thanks

Regards :

                   <a href="https://www.firstwebsol.com/">Muhammad Imran</a>