Chord progression in the key of Gb.
The chords are: Cbmaj (IV), Bbmin (iii), Cbmaj (IV), Gbmaj (I)
The video is a still image of a music staff with the chord notes
and guitar chord diagrams.
The audio was generated using the MMA: Musical MIDI Accompaniment
"CharlestonWalkPlus" groove at 110 beats per minute.