Chord progression in the key of Bb.
The chords are: Bbmaj (I), Gmin (vi), Fmaj (V), Ebdom7 (IV)
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
"JazzGuitar3" groove at 120 beats per minute.