Here's some stuff I didn't put in the video.
(I am aware I made spelling mistakes in the video)
1) I know the boy being locked in the restrant didn't happen until one night before the party, meaning he couldn't have seen Shadow Bonnie and Shadow Freddy as a representation for the killers because they he sees them 3 day's until the party. However I think he was locked in the room before and that is why he was crying so much when he was locked in there again.
2) I do think there are two murderers, the purple man and the pink man. We all know what happend to the purple man, but I think the pink man was arested and thowen in prision becuase in FNAF 1 a news article says the killer was caputred.
3) I think at the end of FNAF 4 the boy does die and inhabits Golden Freddy, however he could still be in a coma and could still be contoling golden freddy that way. Also I think in the end when the toy's come to see the kid an tell him they are still his friends, they covinces him to help him catch there killer.
Thank you for reading the discription and I can't wait until FNAF 4 DLC comes out, maybe it will prove my theory or completly de-bunk it, who knows.
It's just fun to speculate.
Also the music in this is called Gem Shards and is from the show Steven Universe.