@colombia20102018 Well, I never told you to overwrite anything, but to add said lines to the end of the config file. A video wouldn't help much more if you don't follow it exactly either, and you don't have to know anything about scripts just to add two lines at their end (besides that the config file isn't a script anyway).

Follow instructions exactly as given, lest you stand in your own way on the path to success.

This only as a friendly word of advice for the future – imagine the sentence in bold print shouted in an overacting, dramatic voice like in bad movies. 😉

I'm glad that it's working for you now. Have fun with RetroPie!