Doodly videos can be duplicated when in your main Doodly dashboard. Simply select the video you would like to duplicate, right click on the title and select Duplicate Video:

The duplicated video will then be added at the very end of your project list as a copy with all of the properties of the original project:

To rename a video, go to Settings option at the bottom left-hand side and in the Title field you can rename the video as needed. Alternatively, you can also click at the end of the title at the top of your project and edit from there.

To duplicate a scene when you are working within that scene click on the "+" icon. Then, drag the end of the scene out to extend it as needed.