Gather the required dependencies by running this command where you install the bot:
npm update --save
Edit the credentials in the config/config.js. Add the id of the users that can setup the bot in config/admins. Then run using
node johnbot.js
Make sure the account the bot is running is already added to a server you have access to, then type !setup to set that bot in the text channel and the voice channel you're in.
To use the youtube features, add your api-key to config/googleapikey.txt.