Hi @fteusc,
Greetings from the Roku Community!
We appreciate you letting us know about this. If the issue persists on one channel after attempting the troubleshooting steps and videos from other channels play fine, please contact the channel provider's customer support team to report the issue and get help. The channel developers themselves maintain channels on Roku. In this case, an issue within that specific channel likely needs to be addressed with an update from them.
Let us know how it goes so we can determine the next steps that we can take on our end.
Kind regards,
Eunice
Eunice L.
Roku Community Moderator