I wonder why features like this are taking so long? I thought it was trivial. Apple should just hijack control of it. Anything that uses a video playing API will support PIP when leaving the app. If they use the standard video controls, it will add a button. If it uses custom controls, it's up to the devs to add it. At the least leaving the app will turn it on. I'm not sure why it wasn't this way to begin with. Anyone know of a technical reason? I'm pretty sure YouTube will never add this because they hate us, lol.