Good job on the script. After installing the script a few months ago, I had customized the userConfig section to use the "btn" & no tags options.
I was using YouTube recently as usual when I noticed all these download links and tags appearing. I eventually remembered installing this userscript and edited the values back.
I was wondering or would like to make the suggestion about whether there might be a way to separate and store the userConfig from the main script, so that when there's an update, user's settings won't be reset. cheers