In the standard Freeware version, Karaoke 5 is a K5, MIDI, KAR, KFN, MP3, WMA, MP3+CDG, WMA)CD+G, VS (Virtual Score) and VIDEO ( MP4, FLV etc) player.
You can also download videos from Youtube, removes vocals from an original song in real time (devocalizer) and plus many other useful functions for making Professional Karaoke.