Mux files .description with mkvmerge help

[gabriellluz]

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Hi there. I've acidentally downloaded an entire YouTube channel using the option create .description files and info.json. I cannot download again because the channel was removed by YouTube. How can I mux those .description files into MKVMERGE as a comment or a summary? I have many files in a folder.

My structure is like this:

video.mp4
video.srt
video.description
video.jpg

That's what I do for adding covers:
FOR %%f IN (*.mkv) DO (
"C:\Program Files\MKVToolNix\mkvpropedit.exe" "%~nf.mkv" --attachment-name "cover" --attachment-mime-type "image/jpeg" --add-attachment "%~nf.jpg"
)

I've created a windows batch to successfully mux srt and jpg but I don't know how to merge the description file as a tag. Probably I must use mkvpropedit but I don't know how to use .description file as a variable. I need your help. I've tried on mkvtoolnix forums but they were really rude.

[dstftw]

Why do you even think this is possible? Anyways address this to support of merge tool you are using.