VLC player allows for pip but when I open terrarium app play a movie in VLC and pip it. Then when I open Vader's and pick a channel it closes the vlc app so I've not figured out a true pip setup but for now watching a show with VLC and being able to pip while I look through other apps is Handy. Sadly Vader streams only lets me use VLC when doing on demand stuff.

So, for now only VLC has PiP?

TV OS has to be 7 or above (so Oreo for Mi Box), and the app has to have support for it, specifically support for ATV's code for it. Not sure many do.

If you mean multi-view, the S905X doesn't have the video processing capabilities that the Shield or Apple TV 4k have to do that kind of coverage, but I think theoretically it can?

I'm guessing it's a huge performance trade-off however, otherwise every sport app on the thing would have it.