show error of closed channel

[2-www]

Checklist

• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I'm aware that this is a request for NewPipe itself and that requests for adding a new service need to be made at NewPipeExtractor.
• I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

if you open a video from a deleted channel (example) then it shows a generic error and only in the report it shows "This video is no longer available because the YouTube account associated with this video has been closed." (and only you need to scroll right), i think the error should be more visible

Why do you want this feature?

currently the UI does not make it clear that it is gone forever, it looks like a generic error and one might think they need to reconnect to network or something

Additional information

_{i read the small text!!}