Where can I lock the App's orientation (would like Portrait only)? How would I override to Landscape for moview?
lock view orientation
Did you try control centre? Swiping up from the bottom of the screen in any orientation should reveal a layer that includes controls for Airplane mode etc. The icon with the padlock and circular arrow is the orientation lock. Try this.
That said, there does seem to be a mssive issue with orientation in iOS 9 Beta 3. Sometimes when my phone is locked, the lock layer is portrait and the control centre slider is landscape, very odd indeed and annoying as ****.