You can use any video you create as a template for new videos. In order to do so, you only need to make a copy of your original video. Creating a copy of your video is very easy: First click on the eye icon that appears on the video thumbnail to go to the details page of your video. Then click on the "Copy" button below the preview of your video. A duplicate of your original video will then appear in your project list.
Afterwards you can change the name and description of the copied video to suit the new subject.