He presented the project, about the son of a man involved in an infamous CIA LSD experiment, with producer Nikki Parrott of Tigerlily Films and executive producer Julie Goldman of Cactus Three.
Berczeller is a Bafta-nominated director and writer whose previous projects include This Is A True Story, Here To Where and the forthcoming My Way.
The second and third best pitches, as voted by the panel of commissioners, were Jamie Johnson with Son Of Eurovision: A Popumentary and Lucy Walker with Untitled Pow-Wow Project.
The panel of funders included Nancy Abraham of HBO, Cynthia Kane of ITVS, Christine Lubrano of IFC, Cara Mertes of the Sundance Fund, Andrea Meditch of Discovery Docs, Mark Atkin of SBS Australia, Liesl Copland of Netflix, Jutta Krug of WDR Germany, Mette Hoffman Meyer of DR TV, Bert Janssens of Humanist Broadcasting Foundation, Flora Gregory of Al Jazeera, Yukari Hayashai of NHK Japan, and Nathalie Verdier of Arte.
The other pre-selected pitchers were Henry Singer with The Blood Of The Rose, Isaac Julien with Derek Jarman, Caroline Deeds with The Witches, Tom Roberts with The Glorious 7th Cavalry, Daisy Asquith with The Great Velcro, Simon Chambers with Cowboys In India, Alan G Parker with Who Killed Nancy, Marc Hawker with Gross National Happiness, Thea Newcomb with So You've Been Dumped, and non-UK guest pitcher Johan Grimonprez with Double Take.
Britdoc continues through tomorrow in Oxford.