Chord progression in the key of Ab.
The chords are: Cmin (iii), Dbdom7 (IV), Ebmaj (V), Dbdom7 (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
"50sRock" groove at 105 beats per minute.