[Substack] allow multiple embeds regardless of post type

yt_dlp/extractor/substack.py

@@ -133,7 +133,9 @@ class SubstackIE(InfoExtractor):
             canonical_url = urllib.parse.urlparse(url)._replace(netloc=domain).geturl()
 
         post_type = webpage_info['post']['type']
+        post_title = traverse_obj(webpage_info, ('post', 'title'))
         formats, subtitles = [], {}
+        all_results = []
         result_info = {
             'id': str(webpage_info['post']['id']),
             'subtitles': subtitles,
@@ -144,7 +146,9 @@ class SubstackIE(InfoExtractor):
             'uploader_id': str_or_none(traverse_obj(webpage_info, ('post', 'publication_id'))),
             'webpage_url': canonical_url,
         }
+        # handle specific post types which are based on media
         if post_type == 'podcast':
+            podcast_result = dict(result_info)
             fmt = {'url': webpage_info['post']['podcast_url']}
             if not determine_ext(fmt['url'], default_ext=None):
                 # The redirected format URL expires but the original URL doesn't,
@@ -153,21 +157,21 @@ class SubstackIE(InfoExtractor):
                     HEADRequest(fmt['url']), display_id,
                     'Resolving podcast file extension',
                     'Podcast URL is invalid').url)
-            result_info['formats'] = [fmt]
-            return result_info
-        elif post_type == 'video':
+            podcast_result['formats'] = [fmt]
+            all_results.append(podcast_result)
+        if post_type == 'video':
+            video_result = dict(result_info)
             formats, subtitles = self._extract_video_formats(
                 webpage_info['post']['videoUpload']['id'], canonical_url)
-            result_info.update({
+            video_result.update({
                 'formats': formats,
                 'subtitles': subtitles,
             })
-            return result_info
-        elif post_type == 'newsletter':
-            results = []
+            all_results.append(video_result)
+
+        # search for embedded players on the page
         found_items = []
         post_id = str(webpage_info['post']['id'])
-            post_title = traverse_obj(webpage_info, ('post', 'title'))
         assert result_info['uploader_id'] is not None, 'newsletter posted without user_id'
 
         video_players = re.finditer(
@@ -230,12 +234,10 @@ class SubstackIE(InfoExtractor):
                 'uploader_id': str_or_none(json_vid_data.get('user_id', None)),
                 'uploader': None,  # video uploader username is not included
             })
-                results.append(new_result)
+            all_results.append(new_result)
 
-            if len(results) > 0:
+        if len(all_results) > 0:
             playlist_title = f'Videos for {post_title}'
-                return self.playlist_result(results, post_id, playlist_title)
+            return self.playlist_result(all_results, post_id, playlist_title)
         else:
             self.raise_no_formats(f'Page type "{post_type}" contains no supported embeds')
-
-        self.raise_no_formats(f'Page type "{post_type}" is not supported')