Yahoo! buys Dreamworks’s Ptch app

Ptch, the mobile video startup produced by Dreamworks Animation, has been bought by Yahoo! for an undisclosed amount and will close the app come January 2.  The app lets users remix videos with music and effects and allows other people to access original clips in order to create a mashed up story out of an event or shared experience. Users can download the ptches or save them on the camera roll before the app shuts down.