In the project's grid view, tap on the thumbnail for the snippet you'd like to manage. While in the detail view, tap on the icon at the upper right-hand corner of the snippet thumbnail—this will bring up a menu with several options.
Please note that if you no longer have the source video of your snippet in your Camera Roll, you'll have limited editing capabilities. For example, you won't be able to change the portion of the video you selected to create your snippet or change its duration.
*The options to edit and copy snippets are only available in the iOS app at the moment.
⚠️ Some of these actions are irreversible. ⚠️