The videos you download from YouTube are always in FLV format, for which it is necessary to have a specific player, that is incompatible with all the other players. To make any FLV video you download from YouTube more compatible you need Freez FLV to AVI/MPEG/WMV Converter 1.5. It will convert FLV files to the more compatible and popular AVI, MPEG and WMV, for you to watch and enjoy them on any player.