Screen mirroring locked in portrait mode
I want to shoot a video using screen mirroring, but when I turn screen mirroring on, it locks itself in portrait mode. If I watch a video, it switches to widescreen/landscape mode, but as soon as I turn the camera back on, it switches back to portrait mode.
MacBook Pro, macOS Sierra (10.12.6), iPhone X, iPad Air, iPod, iPod Nano