In Music Maker you can make, and export, a music video by loading a video, supported formats only, with or without audio, or one or more Visuals onto track one and apply any Video Effects to this if required and add your own composition on lower track(s).
Video - open File Manager browse to the folder where the video clip is and drag it onto track 1. Trim it if necessary.
Visuals - select the visual required and drag it onto track 1 - to make the visual longer/shorter drag the right edge Left/Right to the desired length.
Video effects - select the video effect required, drag and drop it on the video clip or Visual