Chord progression in the key of C.
The chords are: Gmaj (V), Bdim (viiº), Bdim (viiº), Abmaj (VI)
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
"CubanGuitar" groove at 95 beats per minute.