When it says “unsupported format” it does sound as if the codec used when encoding the videos is not present on your PC.
You might want to try playing the videos using an alternate video such as VLC. Also to find out which particular video and audio codecs was used you can follow this page.
i downlaoded few cartoons from you tube using dvdsoft and then converted them to avi format using foxtab avi converter.
few files worked but few are not working.
i am trying to play them but it says unsupported format.
what do i do? pls help