WTV is a file container format in which the Windows Media Center use to store recorded TV content. WTV has one negative point that it play on very few media players like Windows Media Center. So if you wish to play a WTV in Windows Media Center, you have to edit WTV in Adobe premiere otherwise you have to import WTV to some AVI supported devices like PSP, Xbox 360 etc and you have to convert WTV to AVI if you want to good playback. Since there are many WTV converter which can only convert WTV to DVR-MS or other video formats.