One if the new features in apple's iOS 9 OS is a new picture in picture mode, this allows you to view a video or have a FaceTime call on your iPad whilst viewing other content on your device.

Doom gets multiplayer patch, upcoming photo mode for your demonic picture needs A fix for today with more to come later this month by Megan Farokhmanesh Source Bethesda Softworks Jun 10, 2016, 9: ...