[postprocessor/FixupDuplicateMoov] Fix bug in triggering

yt_dlp/YoutubeDL.py

@@ -3312,7 +3312,7 @@ class YoutubeDL:
                                      or info_dict.get('is_live') and self.params.get('hls_use_mpegts') is None,
                                      'Possible MPEG-TS in MP4 container or malformed AAC timestamps',
                                      FFmpegFixupM3u8PP)
-                        ffmpeg_fixup(info_dict.get('is_live') and downloader == 'DashSegmentsFD',
+                        ffmpeg_fixup(info_dict.get('is_live') and downloader == 'dashsegments',
                                      'Possible duplicate MOOV atoms', FFmpegFixupDuplicateMoovPP)
 
                     ffmpeg_fixup(downloader == 'web_socket_fragment', 'Malformed timestamps detected', FFmpegFixupTimestampPP)