At Hogwarts, they decide to have a seminar on Muggles tech. So, they set up a VCR and a tape - surprise, it's the Ring tape.
The usual set of students and faculty are gathered. All the major kids and professors. Assume it's in middle of the series, the kids are around 15 to 16.
The tape comes on, Samara wants to do her thing.
What happens?