Advice? >.>
If you played using the music sheet to the actual song, and if it had vocals with it, then i suggest perhaps making two versions of the song.
One with only the piano version and the other version play the vocal version with piano (exclude the bass (or left hand version). Then you can use like Windows Movie Maker and put the two songs together and like have it playing it both.
That way people can follow along with the song more easily since the piano version of this is very repetitive (its basically C# E A E C#(8^) E A, C# E G# E G# E).