It happened three days ago. All the movies I used to enjoy lost the video.

If I push Triangle-I-I button on Roku remote, I can see the movie frames above the horizontal line.

I called Roku 2 times, removed and added YouTube channel twice.

Rebooted the modem, the Roku, checked the extender.

Used YouTube without signing-up, and with it.

Used various HDMI TV ports.

Unplugged and plugged back the SONY Bravia.

What is the next step, please?