I actually sat through all the visuals of the monitor, here's my two cents on it. There doesn't seem to be any actual predetermined order to the scenes, this is just me piecing them together.
Girl gets doll, girl is severely freaked out by doll. Doll goes insane and butchers people outside in the hallway. Girl looks through the lock on her door to see the doll manifested at some anthropomorphic Fredd Krueger monstrosity. My take is that it's literally someone's nightmare, that's why it's chaotic and makes no sense. The name of the stage is Nightmare Theater so who knows, someone's nightmares probably shows like a movie on that screen.
Man, GG stages always make you think don't they?