You don’t need to paste it anywhere, he’s just showing you what the “FLoadingScreenAttributes” struct contains. You already have access to the struct members as long as you included the MoviePlayer module.
So if you wanted to make movies unskippable, for example, you could use your FLoadingScreenAttributes object (which is called “LoadingScreen” in his example) and say “LoadingScreen.bMoviesAreSkippable = false”. Or if you wanted to change the MinimumLoadingScreenDisplayTime to 5 seconds, you could say “LoadingScreen.MinimumLoadingScreenDisplayTime = 5.0f”.