Edit an existing video clip
Once you've added a video clip and created your Relive video, you won't be able to adjust the length of the same video clip again during editing.
To change the video clip length, you need to replace it by following the steps listed below:
In the Customise 3D video screen, tap the blue dot on your video to remove the entire video clip
Tap Save to create the video without your video clip
Once the video is created without the clip, tap Customise 3D video to go back into editing
Add the video clip back in, trim it again, then Save.