While Robbie is tied to the bed flicking through the channels, the animated show he is watching is a scene from the film Mr Crocket another Hulu horror film.
The "hungry ghost" (egui) mentioned in the movie is a part of Buddhist culture, where it is believed that those who driven by strong emotional needs such as passion, greed or malice in an animalistic way, will enter a different realm in life, forever searching to fulfil their emptiness, remaing "hungry" for what they need.
The movie is an American production.