Q:"How do I rotate a video in iPhoto?" - Quora
Q:"With the new iPhone 6, I notice that video that I record in landscape orientation is often rotated 90 degrees on playback. What's the best approach for getting my videos rotated 90° back?" - Apple Community
As the typical questions gathered in the forums above suggest, different users may have a similar need to rotate an upside down video. You might also wonder how to rotate a video in iPhoto to lock the orientation. For the final normal playback, today we will guide you clearly in this post and successfully remove all doubts from your mind.