After you make a video, you can edit anything except for the video scenario.
To edit your videos:
1. Go to My Creations, and open the Videos section.
2. Click Edit on the video you want to edit.
If you download a video (with a Magic Pass or Download Pass), you can still edit it, just remember that it will need to generate again before downloading again.
NOTE: While the video is generating (with the turning wheels animation), edits cannot be made.