[youtube] Extract live HLS URL from player response (closes #18799)

youtube_dl/extractor/youtube.py

@@ -1931,8 +1931,15 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                         'http_chunk_size': 10485760,
                     }
                 formats.append(dct)
-        elif video_info.get('hlsvp'):
+        else:
-            manifest_url = video_info['hlsvp'][0]
+            manifest_url = (
+                url_or_none(try_get(
+                    player_response,
+                    lambda x: x['streamingData']['hlsManifestUrl'],
+                    compat_str)) or
+                url_or_none(try_get(
+                    video_info, lambda x: x['hlsvp'][0], compat_str)))
+            if manifest_url:
                 formats = []
                 m3u8_formats = self._extract_m3u8_formats(
                     manifest_url, video_id, 'mp4', fatal=False)
@@ -1955,7 +1962,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
                     error_message = extract_unavailable_message()
                 if error_message:
                     raise ExtractorError(error_message, expected=True)
-            raise ExtractorError('no conn, hlsvp or url_encoded_fmt_stream_map information found in video info')
+                raise ExtractorError('no conn, hlsvp, hlsManifestUrl or url_encoded_fmt_stream_map information found in video info')
 
         # uploader
         video_uploader = try_get(