There are two ways that the video upload feature can be utilized.
The first is from the search screen. The second is from the footage screen in the editor.
From the Search Screen:
From the Video Editor:
In both locations the process works the same way.
Simply click " Upload Video" and select from your computer which video clip to use.
Once the video is uploaded you can select the 15 seconds of the clip that you would like to use for your video creation.