just my opinion here, but Apple screwed the entire universe when they applied the term “Picture-in-Picture” to the iOS feature they created. i may be wrong here, but i’m not so sure the original poster was asking for PIP in the sense that most devs think these days. i’ve asked about PIP before, and i know for a fact practically everyone who responded had no clue what i was talking about. the term PIP has been so mutilated that even the ESPN app has had to coin a new name to the true meaning of PIP. ESPN calls it Multicast. Apple’s idea of PIP is reducing an app to a small floating window allowing access to the Home screen, and hence further navigation of the system. this has screwed us all because the real meaning of PIP is viewing two or more multimedia streams on a single screen, with each image being scaled equally or layering one or more small streams over a primary fullscreen stream. I’m going to put it out there that i think when your Channels users are asking about PIP, they aren’t asking for PIP in the sense that Apple has evolved but the meaning of the word that’s been around since premium televisions of the 80s and later, which oddly enough even newer tvs have stopped including as a feature. all that said, no matter what you call it, i like many others would like to be able to view two or more channels at the same time on a single screen with various options for “window” arrangement, to include easy audio switching of which channel is to be heard.
edit: if there’s any question what i’m talking about, download the ESPN app for tvOS and play around with Multicast. that’s what i and others are asking for in Channels. is it possible?