Even if you are able to compress a 10gb video file down to 2gb you still won't that one single file onto a cd-r. The most effective type of file compression for video is dvd burning software since it breaks down one file into several smaller ones in different formats for both audio and video. You can take a large video and edit into segments for several video cds. For simply saving large video files to disk you would still need a dvd burner to create data dvds. But even those only hold 4,2gb.