The MailOnline, the digital side of The Daily Mail, has used Facebook’s header-bidding product for the past six months. While it is happy with the results so far, Lauren Dick, head of emerging platforms at MailOnline, says Facebook could extend the product across all platforms. Dick joined us at Digiday’s Programmatic Summit in Wicklow, Ireland, to discuss MailOnline’s experience so far with header bidding on Facebook and the challenges in its expansion in vertical video.