Add message when there are no subtitles/thumbnails

Closes #5551

yt_dlp/YoutubeDL.py

@@ -3930,7 +3930,7 @@ class YoutubeDL:
         elif not self.params.get('overwrites', True) and os.path.exists(descfn):
             self.to_screen(f'[info] {label.title()} description is already present')
         elif ie_result.get('description') is None:
-            self.report_warning(f'There\'s no {label} description to write')
+            self.to_screen(f'[info] There\'s no {label} description to write')
             return False
         else:
             try:
@@ -3946,15 +3946,18 @@ class YoutubeDL:
         ''' Write subtitles to file and return list of (sub_filename, final_sub_filename); or None if error'''
         ret = []
         subtitles = info_dict.get('requested_subtitles')
-        if not subtitles or not (self.params.get('writesubtitles') or self.params.get('writeautomaticsub')):
+        if not (self.params.get('writesubtitles') or self.params.get('writeautomaticsub')):
             # subtitles download errors are already managed as troubles in relevant IE
             # that way it will silently go on when used with unsupporting IE
             return ret
-
+        elif not subtitles:
+            self.to_screen('[info] There\'s no subtitles for the requested languages')
+            return ret
         sub_filename_base = self.prepare_filename(info_dict, 'subtitle')
         if not sub_filename_base:
             self.to_screen('[info] Skipping writing video subtitles')
             return ret
+
         for sub_lang, sub_info in subtitles.items():
             sub_format = sub_info['ext']
             sub_filename = subtitles_filename(filename, sub_lang, sub_format, info_dict.get('ext'))
@@ -4001,6 +4004,9 @@ class YoutubeDL:
         thumbnails, ret = [], []
         if write_all or self.params.get('writethumbnail', False):
             thumbnails = info_dict.get('thumbnails') or []
+            if not thumbnails:
+                self.to_screen(f'[info] There\'s no {label} thumbnails to download')
+                return ret
         multiple = write_all and len(thumbnails) > 1
 
         if thumb_filename_base is None: