Welcome to the Roku Community, @perki150!
Thanks for reaching out. We'd like to provide further information about the availability of The Roku Channel on your Samsung TV.
Please be informed that the Roku streaming platform constantly upgrades and updates its running software operating system. It might be possible that your Samsung TV's OS version is out of date which might cause playback issues or no playback at all.
We suggest updating the software version of your Samsung TV, as The Roku Channel is available on Samsung TVs with Tizen OS 2.3 and above.
We hope this helps!
Best regards,
Carly
Carly Y.
Roku Community Moderator