I suppose that video mash-ups could be considered a kind of art form. There is artistic vision and skill involved in recombining video footage like DNA into a distinctively new story.
Jan van den Hemel and Andrew Hussie (a project collectively named jandrewedits) have created a collection of humorously (and ingeniously)edited footage from Star Trek: The Next Generation...
*Warning: some vids contain homo-sexual content, but hilarious and non-graphic
also inventoried here: http://www.jandrewedits.com