[cleanup] Replace dead example/test URL (#17061)

* Replace dead example URL in documentation
* Replace primary Youtube test URL
* Remove obsolete `test_youtube_lists` module

Closes #12263
Authored by: bashonly

yt_dlp/extractor/generic.py

@@ -778,7 +778,7 @@ class GenericIE(InfoExtractor):
                     if default_search == 'auto_warning':
                         if re.match(r'^(?:url|URL)$', url):
                             raise ExtractorError(
-                                f'Invalid URL:  {url!r} . Call yt-dlp like this:  yt-dlp -v "https://www.youtube.com/watch?v=BaW_jenozKc"  ',
+                                f'Invalid URL:  {url!r} . Call yt-dlp like this:  yt-dlp -v "https://www.youtube.com/watch?v=YE7VzlLtp-4"  ',
                                 expected=True)
                         else:
                             self.report_warning(