NAME OF HORROR MOVIE? check details

so when I was little I remember seeing a horror movie and I want to watch it again... the only part I remember is that it envolved something with the number 666, a unborn baby in a stone, and someone tripping down the stares and being decapated by a poster while falling. I think it involves a child and the colors of that scene was like in an old house and it was all yellowish colors and like a priest and a couple. DOSE SOMEONE KNOW PLEASE HELP.. im sure its not the omen but idk maybe can u just tell me the movie and if you find the scene on youtube

Watch creepypasta a on YouTube Xd