Videomaker is a free theme for WordPress created by Automattic.
Videomaker is a free, minimalistic WordPress theme ideal for film directors and video creators.
(Description "Videomaker" Theme from wordpress.org)
You can download Videomaker for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of Videomaker Theme can be found here.