Use "npm install -g peerflix-server" (without quote) to install and "peerflix-server" (without quote) to run it.
And then, open your browser and open localhost:9000 or if you're using a VPS, vps-ip:9000.
What information you need?
It only works with linux (I guess, as it only give install instructions on linux command). Open your terminal (Ctrl + Alt + T), and type the command I gave above.
If you got any error, read the error and install required package. And re-run the command. After that you can start the server with "peerflix-server" (without quote), then you're done.
The full installation of the peerflix server is solely performed via the command line in text mode. So you actually have to type in commands. There is no GUI or similar. After you installed and started the peerflix server you can access it over http://ipofyourserver:9000/
A tutorial with pictures is not going to look any different than a tutorial that is provided at NodeJS to install NodeJS and the commands to install peerflix on the Github Readme.
Why don't you start off with telling us which OS you are using?