Select a video to open it in Detail view, and then select Trim and rotate
Select the Settings icon, and then select one of the available video Quality options.
In the Trim & Rotate panel, select the Play or Pause icon to preview your video.
Hold and drag the Video Progress slider handles to trim the beginning or end of your clip.
To change orientation, select Rotate.
To flip your video horizontally or vertically, select the Flip H or Flip V.
Select the Done to save your settings.