Staying with it

Three months in, BBC Ideas report an average video completion rate of 65%, and say they think that's pretty good, without offering comparative data.

E-Marketeer defines completion rate as "the average percent of creative viewed (including partial views) for video impressions". Figures from Videology released last month say the completion rate for video ads delivered on connected devices, computer, tablets and smartphones across 2017 was 86.8%.