I've never found walkthrough videos very useful for anything, and have not seen any at all for Macaroon. Your best bet is to make sure you have looked through all of the options, read the relevant parts of the official FAQ (there's a link on the download page), and then ask specific questions here (eg. what you want to accomplish, what you already tried, how it worked or didn't work). Trying to write a reference manual to cover everything everyone could ever want to do with Macaroon would probably require more time and effort than writing the addon in the first place.