I'm trying to submit a video preview for the App Store for my iPhone X app, but when I exported with iMovie, it's exporting in the iPhone 6 size, not X. When I tried uploading to iTunes Connect, it said it's the wrong size. I don't know if iMovie doesn't support the X yet or if it's a bug?
And is there any way for me to change the frame size of the video so I can upload? Thank you!