I'm getting the error:
VideoBackgroundConfig with screen size of zero received, skipping config step
(seen it a few times on this forum but not seen any responses that work to fix it)
New iPad Pro 10.5" with the rear facing camera (front facing camera works fine incidentally).
Tried with Unity 5.6.1p1 and Unity 2017.1, Xcode 9.0beta
I'm guessing it might be a bug to do with the new iPad Pro models and their cameras not been updated in the vuforia engine? I have the same code running on an iPhone 7 and iPad Pro (2016 model)