Automator workflow setup help

The following Automator workflow will prompt for the folder on your server, and the make new folders in that selected folder for the basename of each file in it — before moving those respective files into their own named folder. I tested this with my Synology Diskstation, and the Automator workflow was run on Mojave 10.14.6 with success.

The replacement script for the Run Shell Script boilerplate is as follows. It is written for the zsh shell and is quite quit. You can adjust the different video file extensions that it may encounter.

DIR="${1}"

for f in ${DIR}/*.(mkv|mp4|m4v|mov|avi)(.); do
    newdir=${f:a:t:r}
    fname=${f:a:t}
    # make the dir if it does not exist
    [[ -d $newdir ]] || mkdir $DIR/${newdir}
    mv ${f} ${DIR}/${newdir}/${fname}
done

Good, and you are welcome. The modifiers that you see (${f:a:t:r}) are described in the zsh man page:

man zshexpn