This backing track helps you study the Two Five One progression, (or II -V- I) in minor keys. One of the most important progressions, and indispensable for Jazz.
The Video plays the 2-5-1 (in twelve different keys) descending one semitone, that is, chromatically descending each time we change key.
In the picture, you can see the minor progressions in all keys, for different instrument tuning. Instruments in E Flat, instruments in C, instruments in B flat.

Backing Track with the full II-V-I minor progression in all keys
Audio PlayerIf you want to practice each minor two five one individually, here you have the backing tracks for all keys (standard tuning, check the picture to see the equivalent):
F#m7(b5) B7 Em7 (II- V- I E minor)
Audio PlayerFm7(b5) Bb7 Ebm7 (II- V- I E-flat minor)
Audio PlayerEm7(b5) A7 Dm7 (II- V- I D minor)
Audio PlayerEbm7(b5) Ab7 Dbm7 (II- V- I D-flat minor)
Audio PlayerDm7(b5) G7 Cm7 (II- V- I C minor)
Audio PlayerC#m7(b5) F#7 Bm7 (II- V- I B minor)
Audio PlayerCm7(b5) F7 Bbm7 (II- V- I B-flat minor)
Audio PlayerBm7(b5) E7 Am7 (II- V- I A minor)
Audio PlayerBbm7(b5) Eb7 Abm7 (II- V- I A-flat minor)
Audio PlayerAm7(b5) D7 Gm7 (II- V- I G minor)
Audio PlayerG#m7(b5) C#7 F#m7 (II- V- I F-sharp minor)
Audio PlayerGm7(b5) C7 Fm7 (II- V- I F minor)
Audio Player
Study also major Major seventh chords backing track