Hey Mus, they are using a classic turn-a-round for that song. Very simple. Ab, F, Db, Eb in the bass, You supply the right hand chords. (The "Heart and Soul" turn-a-round). As the key changes, the turn-a-round changes. I noted a G, I think and a Bb as you went from scene to scene. You have to play with the turn-a-round to give it life. Oh, Ab
Berbie