The copper spark plugs won't last as long as the more expensive ones, but they're so cheap I wouldn't mind replacing them every 10k-15k km.
It sounds like you're running factory coils, they're 10+ years old now and wouldn't be working as awesomely as new ones. You can always get new Yellowjacket coils for a very good price. Even if your old coils are working "fine", new ones make a difference (well they did on my car, but mine is turbo).
I can't watch the video loud (at work), but if it's running smoother than before, maybe just drive around for a bit until you can replace the coil packs.
Also, why would you need an aftermarket uprated fuel pump for an N/A?