I do not understand from Video 224 that they require to run on iPad. In fact, you can see at the very beginningt the checkboxes to select target, iPhone, and / or iPad.
But split screen multitasking is only required if you target iPad.
> do not understand from Video 224 that they require to run on iPad.
Unless something has changed, this continues to be related to how iPhone apps can be run in 1x/2x mode on iPad and the requirement that the app at least tries to look presentable etc. when doing so. If it doesn't, it can be cause for rejection during review.