Which innovative advertising technique was first successfully used for the film 'The Blair Witch Project' (1999), creating a new paradigm for film marketing?

The film and television industry has pioneered many unique advertising techniques that have revolutionized how products are marketed to audiences. From subtle product placements to elaborate transmedia campaigns, Hollywood has constantly pushed the boundaries of advertising. Test your knowledge about the evolution of advertising techniques specifically within the entertainment industry!

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Viral marketing that made audiences believe the found footage was real through fake websites and missing persons flyers
The first major use of QR codes on movie posters linking to exclusive content
Personalized trailer delivery based on viewer demographics through early streaming platforms
Augmented reality app that let viewers 'find' the witch in their own homes