Apart from audio and video codecs for Windows, Linux, Mac, consoles and mobiles, http://www.afreecodec.com, features a collection of  freeware applications that are bound to make your multimedia usage easier. And yes, if you need some help, do avail of the codec and video support on offer here. (This is  a public document from Sunder Foundation, a NGO, based in Mumbai, for creating awareness to DigiEdu4all. It is online, fee free, anywhere, anytime. For any details, kindly contact: DigiEdu4all