"The Colonel's Son", a story of Roberto Bolaño (not online), appears in the Horror Issue of Granta. I'm presuming this is from the upcoming The Secret of Evil.
The story is about "a B-grade horror flick ... on late night TV." What is online is an animation inspired by this piece.
Nothingbutamovie.com is an HTML5-based animation inspired by Bolaño’s story. It was created by Owen Freeman and web designers at Jocabola.