My professor is trying to find a better format for his videos he makes he is currently using Windows Movie Maker to compress the videos and his first video is 60mb and he wants a format that takes up smaller size without much loss. I have looked into http://www.matroska.org/index.html but I am having a bit of trouble converting them. What software and format do you suggest he uses after he records his videos on his PC. I want to test it and show him the format and software on the already released videos first. Its a tech class and he uses vmware to record his videos and uses a microphone to record his voice. Any help would be greatly appreciated.