Repository: yt-dlp/yt-dlp

Issue:
[livestream extractor] Unable to download JSON metadata (HTTP Error 404)
### Checklist

- [X] I'm reporting a broken site
- [X] I've verified that I'm running yt-dlp version **2021.12.27**. ([update instructions](https://github.com/yt-dlp/yt-dlp#update))
- [X] I've checked that all provided URLs are alive and playable in a browser
- [X] I've checked that all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/ytdl-org/youtube-dl#video-url-contains-an-ampersand-and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command)
- [X] I've searched the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues including closed ones. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [X] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and I'm willing to share it if required

### Region

_No response_

### Description

Downloading of https://livestream.com/accounts/[user-number] gives me an HTTP Error 404. I'd like to download several videos from the account. Individual videos are working.

### Verbose log

```shell
yt-dlp -U --verbose  https://livestream.com/accounts/8712572
[debug] Command-line config: ['-U', '-o', 'C:/Users/XYZ/Downloads/test_DL/output/%(upload_date>%y%m%d)s_%(title)s.%(ext)s', '--verbose', 'https://livestream.com/accounts/8712572']
[debug] Encodings: locale cp1252, fs utf-8, out utf-8, err utf-8, pref cp1252
[debug] yt-dlp version 2021.12.27 [6223f67] (win_exe)
[debug] Python version 3.8.10 (CPython 64bit) - Windows-10-10.0.19043-SP0
[debug] exe versions: ffmpeg 2021-08-10-git-c245963a21-full_build-www.gyan.dev (setts), ffprobe 2021-08-10-git-c245963a21-full_build-www.gyan.dev
[debug] Optional libraries: Cryptodome, mutagen, sqlite, websockets
[debug] Proxy map: {}
Latest version: 2021.12.27, Current version: 2021.12.27
yt-dlp is up to date (2021.12.27)
[debug] [livestream] Extracting URL: https://livestream.com/accounts/8712572
[livestream] Downloading JSON metadata
ERROR: [livestream] Unable to download JSON metadata: HTTP Error 404: Not Found (caused by <HTTPError 404: 'Not Found'>); please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; type  yt-dlp -U  to update. Be sure to call yt-dlp with the --verbose flag and include its complete output. (caused by <HTTPError 404: 'Not Found'>); please report this issue on  https://github.com/yt-dlp/yt-dlp . Make sure you are using the latest version; type  yt-dlp -U  to update. Be sure to call yt-dlp with the --verbose flag and include its complete output.
  File "yt_dlp\extractor\common.py", line 717, in _request_webpage
  File "yt_dlp\YoutubeDL.py", line 3458, in urlopen
  File "urllib\request.py", line 531, in open
  File "urllib\request.py", line 640, in http_response
  File "urllib\request.py", line 563, in error
  File "urllib\request.py", line 502, in _call_chain
  File "urllib\request.py", line 755, in http_error_302
  File "urllib\request.py", line 531, in open
  File "urllib\request.py", line 640, in http_response
  File "urllib\request.py", line 569, in error
  File "urllib\request.py", line 502, in _call_chain
  File "urllib\request.py", line 649, in http_error_default


C:\Users\Puresive Films>
```



Discussion:
To devs:
Events are supported. The API to get the events of an account is 
https://api.new.livestream.com/accounts/8712572/events?older=1

Resolving patch:
diff --git a/yt_dlp/extractor/livestream.py b/yt_dlp/extractor/livestream.py
--- a/yt_dlp/extractor/livestream.py
+++ b/yt_dlp/extractor/livestream.py
@@ -1,33 +1,36 @@
-import re
 import itertools
+import re
 
 from .common import InfoExtractor
-from ..compat import (
-    compat_str,
-    compat_urlparse,
-)
+from ..compat import compat_str, compat_urlparse
 from ..utils import (
+    determine_ext,
     find_xpath_attr,
-    xpath_attr,
-    xpath_with_ns,
-    xpath_text,
-    orderedSet,
-    update_url_query,
-    int_or_none,
     float_or_none,
+    int_or_none,
+    orderedSet,
     parse_iso8601,
-    determine_ext,
+    traverse_obj,
+    update_url_query,
+    xpath_attr,
+    xpath_text,
+    xpath_with_ns,
 )
 
 
 class LivestreamIE(InfoExtractor):
     IE_NAME = 'livestream'
-    _VALID_URL = r'https?://(?:new\.)?livestream\.com/(?:accounts/(?P<account_id>\d+)|(?P<account_name>[^/]+))/(?:events/(?P<event_id>\d+)|(?P<event_name>[^/]+))(?:/videos/(?P<id>\d+))?'
+    _VALID_URL = r'''(?x)
+        https?://(?:new\.)?livestream\.com/
+        (?:accounts/(?P<account_id>\d+)|(?P<account_name>[^/]+))
+        (?:/events/(?P<event_id>\d+)|/(?P<event_name>[^/]+))?
+        (?:/videos/(?P<id>\d+))?
+    '''
     _EMBED_REGEX = [r'<iframe[^>]+src="(?P<url>https?://(?:new\.)?livestream\.com/[^"]+/player[^"]+)"']
 
     _TESTS = [{
         'url': 'http://new.livestream.com/CoheedandCambria/WebsterHall/videos/4719370',
-        'md5': '53274c76ba7754fb0e8d072716f2292b',
+        'md5': '7876c5f5dc3e711b6b73acce4aac1527',
         'info_dict': {
             'id': '4719370',
             'ext': 'mp4',
@@ -37,22 +40,37 @@ class LivestreamIE(InfoExtractor):
             'duration': 5968.0,
             'like_count': int,
             'view_count': int,
+            'comment_count': int,
             'thumbnail': r're:^http://.*\.jpg$'
         }
     }, {
-        'url': 'http://new.livestream.com/tedx/cityenglish',
+        'url': 'https://livestream.com/coheedandcambria/websterhall',
         'info_dict': {
-            'title': 'TEDCity2.0 (English)',
-            'id': '2245590',
+            'id': '1585861',
+            'title': 'Live From Webster Hall'
         },
-        'playlist_mincount': 4,
+        'playlist_mincount': 1,
     }, {
-        'url': 'http://new.livestream.com/chess24/tatasteelchess',
+        'url': 'https://livestream.com/dayananda/events/7954027',
         'info_dict': {
-            'title': 'Tata Steel Chess',
-            'id': '3705884',
+            'title': 'Live from Mevo',
+            'id': '7954027',
         },
-        'playlist_mincount': 60,
+        'playlist_mincount': 4,
+    }, {
+        'url': 'https://livestream.com/accounts/82',
+        'info_dict': {
+            'id': '253978',
+            'view_count': int,
+            'title': 'trsr',
+            'comment_count': int,
+            'like_count': int,
+            'upload_date': '20120306',
+            'timestamp': 1331042383,
+            'thumbnail': 'http://img.new.livestream.com/videos/0000000000000372/cacbeed6-fb68-4b5e-ad9c-e148124e68a9_640x427.jpg',
+            'duration': 15.332,
+            'ext': 'mp4'
+        }
     }, {
         'url': 'https://new.livestream.com/accounts/362/events/3557232/videos/67864563/player?autoPlay=false&height=360&mute=false&width=640',
         'only_matching': True,
@@ -179,7 +197,7 @@ def _extract_stream_info(self, stream_info):
             'is_live': is_live,
         }
 
-    def _extract_event(self, event_data):
+    def _generate_event_playlist(self, event_data):
         event_id = compat_str(event_data['id'])
         account_id = compat_str(event_data['owner_account_id'])
         feed_root_url = self._API_URL_TEMPLATE % (account_id, event_id) + '/feed.json'
@@ -189,7 +207,6 @@ def _extract_event(self, event_data):
             return self._extract_stream_info(stream_info)
 
         last_video = None
-        entries = []
         for i in itertools.count(1):
             if last_video is None:
                 info_url = feed_root_url
@@ -197,31 +214,38 @@ def _extract_event(self, event_data):
                 info_url = '{root}?&id={id}&newer=-1&type=video'.format(
                     root=feed_root_url, id=last_video)
             videos_info = self._download_json(
-                info_url, event_id, 'Downloading page {0}'.format(i))['data']
+                info_url, event_id, f'Downloading page {i}')['data']
             videos_info = [v['data'] for v in videos_info if v['type'] == 'video']
             if not videos_info:
                 break
             for v in videos_info:
                 v_id = compat_str(v['id'])
-                entries.append(self.url_result(
-                    'http://livestream.com/accounts/%s/events/%s/videos/%s' % (account_id, event_id, v_id),
-                    'Livestream', v_id, v.get('caption')))
+                yield self.url_result(
+                    f'http://livestream.com/accounts/{account_id}/events/{event_id}/videos/{v_id}',
+                    LivestreamIE, v_id, v.get('caption'))
             last_video = videos_info[-1]['id']
-        return self.playlist_result(entries, event_id, event_data['full_name'])
 
     def _real_extract(self, url):
         mobj = self._match_valid_url(url)
         video_id = mobj.group('id')
         event = mobj.group('event_id') or mobj.group('event_name')
         account = mobj.group('account_id') or mobj.group('account_name')
-        api_url = self._API_URL_TEMPLATE % (account, event)
+        api_url = f'http://livestream.com/api/accounts/{account}'
+
         if video_id:
             video_data = self._download_json(
-                api_url + '/videos/%s' % video_id, video_id)
+                f'{api_url}/events/{event}/videos/{video_id}', video_id)
             return self._extract_video_info(video_data)
-        else:
-            event_data = self._download_json(api_url, video_id)
-            return self._extract_event(event_data)
+        elif event:
+            event_data = self._download_json(f'{api_url}/events/{event}', None)
+            return self.playlist_result(
+                self._generate_event_playlist(event_data), str(event_data['id']), event_data['full_name'])
+
+        account_data = self._download_json(api_url, None)
+        items = traverse_obj(account_data, (('upcoming_events', 'past_events'), 'data', ...))
+        return self.playlist_result(
+            itertools.chain.from_iterable(map(self._generate_event_playlist, items)),
+            account_data.get('id'), account_data.get('full_name'))
 
 
 # The original version of Livestream uses a different system


Test patch: