I recorded my app in action on iPad Air 2, then edited in iMovie. The footage from the iPad was portrait 1200 x 1600. The finished preview video shared as "File" is portrait 1200 x 1600 with empty black bars on each side. I will need to cut off the black bars, correct? So I will have a true 1200 x 1600 video. What do I use to cut off the bars / crop?
(iMovie 10 > File > App Preview. So it was created as an app preview. But when exporting/sharing the App Preview option was not there. So I shared as File. I don't know if that's why I have the blacks bars on each side.)