The horror was that patrons reported seeing their own memories in the box.

Benjamin Beaulieu remains an anomaly. He exists only in the margins, in forum signatures, in the error logs of early-2000s web archives. The Étranges Exhibitions of 2002 were not a success. They were a failure—a beautiful, terrifying, premeditated failure.

Étranges exhibitions is a 2002 French erotic television drama directed by Benjamin Beaulieu Laurent Lévy

It is possible the name or date is slightly different. Several other artists named have held notable exhibitions or produced work that might be what you are looking for: Patrick Beaulieu

The film stars Angela Tiger, Maud Kennedy, and Antoni Saint-Aubin (credited as Jif).