Micromax win 121 from 6 months it is good and looks r great bt it has some problems such as heating on charging, playing games.also it cant support videos of 720p, 1080p however I have downloded an app to play video of 720p bt it causes reduce in battery fast.it is windows 8.1 so its looks r great and also has 8mp camera so photos are also high in quality.
Try downloading Moliplayer for windows 8.1(free version can be downloaded with less functionality but with a better usability like MX Player for android) supports hd video playback all formats. Download this free by changing tha country to china or download the moli player pro app with full functions.