We're using the Easy Movie Texture asset from the asset store and we are trying to play embedded mp4 files on an iPhone 7 device. It works fine with streaming URLs but once I tried to actually Load() an mp4 file it response very unhelpfully:
[prepareAsset]Error: Item cannot be played Unknown error 0 MediaPlayerCtrl:OnError(MEDIAPLAYER_ERROR, MEDIAPLAYER_ERROR)
Is there any special gotchas anyone has seen with the difference between playing in editor and on an iOS device?