fix: better error message when calling extract_info on unavailable video

youtube_dlc/extractor/youtube.py

@@ -1937,24 +1937,25 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
             age_gate = False
             # Try looking directly into the video webpage
             ytplayer_config = self._get_ytplayer_config(video_id, video_webpage)
-            args = ytplayer_config.get("args")
-            if args is not None:
-                if args.get('url_encoded_fmt_stream_map') or args.get('hlsvp'):
-                    # Convert to the same format returned by compat_parse_qs
-                    video_info = dict((k, [v]) for k, v in args.items())
-                    add_dash_mpd(video_info)
-                # Rental video is not rented but preview is available (e.g.
-                # https://www.youtube.com/watch?v=yYr8q0y5Jfg,
-                # https://github.com/ytdl-org/youtube-dl/issues/10532)
-                if not video_info and args.get('ypc_vid'):
-                    return self.url_result(
-                        args['ypc_vid'], YoutubeIE.ie_key(), video_id=args['ypc_vid'])
-                if args.get('livestream') == '1' or args.get('live_playback') == 1:
-                    is_live = True
-                if not player_response:
-                    player_response = extract_player_response(args.get('player_response'), video_id)
-            elif not player_response:
-                player_response = ytplayer_config
+            if ytplayer_config:
+                args = ytplayer_config.get("args")
+                if args is not None:
+                    if args.get('url_encoded_fmt_stream_map') or args.get('hlsvp'):
+                        # Convert to the same format returned by compat_parse_qs
+                        video_info = dict((k, [v]) for k, v in args.items())
+                        add_dash_mpd(video_info)
+                    # Rental video is not rented but preview is available (e.g.
+                    # https://www.youtube.com/watch?v=yYr8q0y5Jfg,
+                    # https://github.com/ytdl-org/youtube-dl/issues/10532)
+                    if not video_info and args.get('ypc_vid'):
+                        return self.url_result(
+                            args['ypc_vid'], YoutubeIE.ie_key(), video_id=args['ypc_vid'])
+                    if args.get('livestream') == '1' or args.get('live_playback') == 1:
+                        is_live = True
+                    if not player_response:
+                        player_response = extract_player_response(args.get('player_response'), video_id)
+                elif not player_response:
+                    player_response = ytplayer_config
             if not video_info or self._downloader.params.get('youtube_include_dash_manifest', True):
                 add_dash_mpd_pr(player_response)