Edit media : Rotate a video or photo
 
Rotate a video or photo
You can rotate video clips and photos to change the orientation of a video. For example, you can rotate a video that you have captured on your phone in portrait orientation to convert it to landscape orientation or you can flip an upside-down video.
How to rotate a video clip or photo
1 In the Timeline, click a video clip or photo.
2 In the Options panel, click the Edit tab, and click Rotate Left or Rotate Right until the orientation you want displays in the Preview panel.