Hi, I can't figure out (a) what I did wrong and (b) whether I can fix this video. I've shot lots of videos on my iPhones. This time, the video shows up in Photos (iOS and Mac OS) rotated 90 degrees. I tried a couple of test videos since, holding the iPhone "upright" and "upside down" and both are normal. I tried rotating the video on my Mac using Photos, but that option is greyed out. Any thoughts? Update: I finally figured out how to use iMovie to rotate the video. Still haven't sorted out why the video was rotated in the first place.