VivaKi have undergone a major transformation as the responsibility for the day-to-day buying has been moved away from the Audience on Demand trading desk and devolved to agencies within the Publicis group. VAN caught up with Marco Bertozzi at Dmexco to discuss Vivaki’s transformation, the idea of a ‘meta-DSP’, Vivaki’s ‘Quality Index’, and his view on the quality of supply. Filmed at Dmexco in Cologne.