youtube-dl: How to strip video information/description when converting from video to mp3

This might be picky, but when i use youtube-dl to convert a video to mp3, i let it also tag the title and embed the thumbnail from the video. Somehow it adds the video description and some other meta video info with it that i don't want. This is the command i use:

youtube-dl -o "%(title)s.%(ext)s" -x --audio-format mp3 --audio-quality 320K --embed-thumbnail --add-metadata --metadata-from-title "%(artist)s - %(title)s" <youtube url>

When i check the id3tag info, it added the video title as expected. If i rename the extension to avi and play the audio file, open properties, i can see unwanted info like the video description, version encoder, brand. The option --add-metadata writes metadata to the videofile that it gets the video description from, but when i leave that out, the video does not get tagged at all.

I read through the documentation of youtube-dl and ffmpeg, but i can't find a proper way to strip the video description/info and keep the mp3 tagged.

Can anyone help me with this?