Many of the walled gardens are being built to cater to both the buy-side and the sell-side, and some sell and distribute content while also producing their own says Mark Zagorski, CEO of Telaria. Zagorski says that both the buy-side and sell-side should ask whether these sorts of companies can really have their best interests at heart, given the apparent conflicts of interest within this business model. In this interview, Zagorski outlines why he believes ad tech’s independence from media is still important, and outlines his views on the growth of ad-supported video on-demand (AVOD). Filmed at the Cannes Lions Festival 2019.