When downloading from YouTube, youtube-dl must merge formats into mkv for not being compatable. This causes a new mkv file to be made which which will replace the mp4 file. This is completely fine, however when using the --add-metadata flag, youtube-dl adds this metadata not when formats are being merged, but after that by creating a whole new video and deleting the old one
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When downloading from YouTube,
youtube-dl
must merge formats into mkv for not being compatable. This causes a new mkv file to be made which which will replace the mp4 file. This is completely fine, however when using the--add-metadata
flag,youtube-dl
adds this metadata not when formats are being merged, but after that by creating a whole new video and deleting the old one