[ie/youtube] Add warning on video captcha challenge (#12939)

Authored by: coletdjnz

yt_dlp/extractor/youtube/_video.py

@@ -3646,6 +3646,8 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                 if 'sign in' in reason.lower():
                     reason = remove_end(reason, 'This helps protect our community. Learn more')
                     reason = f'{remove_end(reason.strip(), ".")}. {self._youtube_login_hint}'
+                elif get_first(playability_statuses, ('errorScreen', 'playerCaptchaViewModel', {dict})):
+                    reason += '. YouTube is requiring a captcha challenge before playback'
                 self.raise_no_formats(reason, expected=True)
 
         keywords = get_first(video_details, 'keywords', expected_type=list) or []