Who is the main character in the VHS tape included in the board game Nightmare?

The main character in the VHS tape included in the board game Nightmare is The Gatekeeper. The Gatekeeper serves as the sinister and imposing host of the game, whose role is to challenge and frighten the players throughout the gameplay. He controls the pace and narrative of the game, setting the eerie atmosphere and creating a sense of suspense and fear for the players. As the central character in the VHS tape, The Gatekeeper's presence and actions drive the story and gameplay, making him the main character in the included video component of the board game Nightmare.