Speaking to TechCrunch on Wednesday, Facebook said that users will soon be able to edit the videos to change moments included in the clips. The company's spokesperson said that Facebook doesn't yet "have exact timing" on the edit launch.
"This will enable people to remove a post from the movie that was pre-selected and change it to a different one," the spokesperson told Facebook.
Interestingly, Facebook's A Look Back help page says that users can edit videos. That feature, however, doesn't appear to be available to users as of this writing.