Stop worrying. Thousands of people build their own arcade controls. The hardware will run the software and it will look EXACTLY like a commercial arcade game. Many people recommend building the hardware first for a couple of reasons. 1- If you get the software all set up first, you're going to waste time playing games when you should be building your cabinet. 2- Your software configuration is going to be dependent on the hardware you use. For example, did you install a trackball? No? Then there's no use setting up your software to be able to play trackball games. Did you use a TV or a real arcade monitor? That will determine how you set up your display settings in software. Etc.
Browsing YouTube is not going to do much for you except make you daydream about the day when you own your own arcade cabinet, rather than actually making that dream come true by actually building it.
As has been mentioned a few times already,
read the Wiki (that's a link, click it).
And, perhaps better yet, get a copy of
The Project Arcade book (that is a link . . . click it). Not only will you find pretty much all the information you need there, you will step-by-step instructions on building an arcade cabinet. It even comes with detailed plans you can use to build the Ultimate Arcade II cab (look at the picture below). Everything you need is there. Exact dimensions. Plans you can print out and use as a pattern for cutting your wood. Lists of materials you will need. List of tools you will need.