HELP!

[ffsharriet]

I have been following this tutorial:

https://www.youtube.com/watch?v=IFk8wjZXaYw

I have completed everything in the video tutorial as they have done, I am up to 9:10 where it says to change config.php back to 6,4,4 and I have done this. Now, the video says it should reload where you can log in to some sort of control panel. All I am getting is a page saying the webpage is not working.

Can someone please advise me? Or even better fix this for me? I can provide my login credentials and information on how I set up the site etc; I just super need help!