Yes it is a macOS application. Anyway, if you are not sure if your macOS submission does not abide by Mac App Store review guidelines, you can have your users download the command-line tool and install it on their own. I would search for 'DVD rip' at Mac App Store. ++ I havent checked that app yet but it is allowed fo let the user install the binary? So for example i instruct them to install via the terminal to type "brew install-ffmpeg" ?