Thoracic Kyphosis

Definition:  Excessive Forward Curvature of the Thoracic Spine
Self-Care:  Exercises to Decompress, Extend and Rotate the Thoracic Spine

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Courtesy of YouTube
Three videos discussing the Anatomy of the Thoracic Spine and Thoracic Kyphosis. 
To counteract Kyphosis, each videographer recommended the same two exercises: 
(1)  Extension-Decompression; and (2)  Rotation.  Enjoy.
Video 1
Thoracic Kyphosis - How To Correct The Rounded Upper Back  (by Sam Visnic)

Beginner 
A Neuromuscular Therapist defines and discusses thoracic kyphosis, with ;ots of great information on anatomy and physiological effects.  Listen closely at minute 1:20 to 1:30 on  "how to correct Kyphosis"
Video 2
"Stop Thoracic Kyphosis"
(by PhysioCambridge)

Beginner
This video is fantastic, a great discussion for the first-timer... Thoracic Spine 101 (if you wish). The video also demonstrates the most basic therapeutic posture for the first-timer, how to decompress the spine.
Video 3
Thoracic Spine Mobility Exercises
(by Dr. Steven Horwitz)

Intermediate + 
EXCELLENT video providing the anatomy of the thoracic spine and several exercises that mobilize & strengthen the thoracic spine.
 List of exercises below.
  • Decompress & Extend (1:03)
  • Rotation 1, Side-lying (2:03)
  • Rotation 2, Side-lying (2:45)
  • Rotation 3, Side-lying (3:19)
  • Rotation 4, kneeling (4:02)
  • Rotation 4, kneeling (5:26)
  • Extension, elbows (6:10)