My iPad Mini 2 got setup on iOS 9.0 fine, all synced fine (backup saved in Mac iTunes). So in Mac iTunes trying several times to transfer Mini 2's backup to new Mini 4, but have Photos problem... A couple of videos (recorded originally on an old iPhone) are 3GP/h263 which transfer (and play!) fine to Mini 2, but when transferring the backup to Mini 4, iTunes shows a warning saying they cannot be transferred to the Mini 4?! Why? Why can I have them on the Mini 2 (where they play fine), but not on the Mini 4? The format is supported, as the Mini 2 on iOS 9 can play them in Photos.app. So damned annoying. And no help can I find anywhere.