You can swipe left on a clip to be able to Edit any tagged data including Athlete Name, Dive #, Apparatus, and Score.
After Swiping to Edit you can switch to the Athletes tab to allow you to change your athlete if you would like. On the right of the screen you can change your Dive #, Apparatus, and Score. Once finished select Update Clip.
Once you have finished editing and tapped Update Clip switching back to the Videos tab will show the clip has been updated to reflect the new tagged information.