Robert_Charlton - 4:14 am on Oct 14, 2012 (gmt 0)
"Time watched" by itself strikes me as a sloppy metric, as a short video would naturally get less time per view. One of the things you learn about editing is to always leave your audience wanting more.
I hope they take that into account and come up with some overall engagement metric. It would be a shame to encourage video makers to pad their content.