The thing is, a "plays effectively" run of Five Nights at Freddy's is extremely, extremely dull. Markiplier actually does a "legit" run of the game for his 7th night if you want to see what I'm talking about, but if you'd rather not see Even More Markiplier, I can sum up for you the entirety of top-level Five Nights at Freddy's play. It's a check list. Ready? Here it goes:
1 - close right door
2 - check Pirate Cove camera
3 - turn off camera
4 - open right door
5 - check right door light - if duck is present, close right door
6 - check left door light - if bunny is present, close left door, go to 7; if no bunny is present, go to 1
7 - close right door
8 - check Pirate Cove camera
9 - turn off camera
10 - open right door
11 - check right door light - if duck is present, close right door
12 - check left door light - if bunny has left, open left door, go to 1; if bunny still present, go to 7
If at any time Foxy has left Pirate Cove when you check the camera, close left door, check left hall to make Foxy run, open left door as soon as Foxy hits it (you hear him bang into the door), go to 1 (or 7 if bunny is still present).
And that's the game. Playing it "right" makes it not a horror game; it's a rhythm game. Seriously.