Facebook admits it vastly overestimated video view lengths

Social media giant Facebook has admitted it has been overestimating the length of video views on its platform by as much as 80%, according to a report in the Wall Street Journal.
The paper cites a letter sent to Publicis Media in the US which admits the site had “overestimated average time spent watching videos by between 60% and 80%”.
On Friday David Fischer, the vice president of business and marketing partnerships, wrote a post explaining how the network had bungled the calculation for average view duration, and apologising to partners.