Did you ever get this working? I'm having the same issue. After looking at their docs, the only way I could KIND OF get it working was to do something like this:
player.control = "play"
player.nextContentIndex = x
player.control = "skipcontent"
However, that's a very poor solution since you briefly see the first video appear before it flips to the x item. It's also unacceptable from an analytic standpoint since there's a quick hit on the first video.