Fetching comments when the uploader has disabled them#213

Documenting what happens when trying to fetch comments of a video that has disabled them. This is a similar behaviour as reported in #212 TLDR: when the video has disabled comments, pipe-viewer ends up displaying a somehow misleading error message. ``` =>> Search for YouTube videos (:h for help) > ada zangemann ``` ``` ** GET https://m.youtube.com/results?hl=en&search_query=ada%20zangemann&sp=CAASBggAEAEYAFAe ==> 200 OK (1s) :: Returning results with a continuation page token... 1. mxI3FWk7wec Ada & Zangemann - Ein Märchen über Software, Ska Free Soft 3m 1.3K 31:33 2. ac3ZZ7WUuZM Ada & Zangemann - A Tale of Software, Skateboard Free Soft 5m 1.1K 31:33 3. ms5vjV4IfoA Ada & Zangemann - Un conte sur les logiciels, le Free Soft 2m 418 31:33 4. xK2vVRR2iPc Ada & Zangemann - Un cuento sobre Software, Mono Free Soft 2w 38 31:33 5. 2bHLxFqTnRo Ada & Zangemann: Ein Märchen über Software, Skat Free Soft 3y 607 44:30 ``` Those videos uploaded by the Free Software Foundation Europe have disabled comments. But lets pretend we dont know that yet, and try to fetch the comments on the first one, ``` =>> Select one or more videos to play (:h for help) > ;c1 ``` We're using the yt-dlp backend first, ``` :: Extracting comments with `yt-dlp`... WARNING: [youtube] mxI3FWk7wec: Cannot decrypt nsig without player_url: Some formats may be missing WARNING: Only images are available for download. use --list-formats to see them WARNING: [youtube] mxI3FWk7wec: Youtube said: Comments are turned off. WARNING: Requested format is not available ``` Actually, yt-dlp got it right, "Youtube said: Comments are turned off". But, pipe-viewer, ignores that and proceeds to try the alternative invidious backend, ``` ** GET https://api.invidious.io/instances.json ==> 200 OK :: Found 0 invidious instances: :: Found 2 invidious instances: inv.nadeko.net id.420129.xyz :: Changed the instance to: https://inv.nadeko.net ** GET https://inv.nadeko.net/api/v1/comments/mxI3FWk7wec?hl=en-US&sort_by=top ==> 404 Not Found (1s) [404 Not Found] Error occurred on URL: https://inv.nadeko.net/api/v1/comments/mxI3FWk7wec?hl=en-US&sort_by=top [!] No comments results! =>> Press <ENTER> for the next page of comments (:h for help) ``` So these last messages are a bit misleading. It's not that there was an "error" or that there were "no comments". It is simply that the comments are disabled by the uploader.