The video outlines a comprehensive approach to correcting rounded shoulders, starting with a simple test to identify the issue. The first step involves improving thoracic mobility using exercises like lying on the stomach and rotating the thoracic spine. This helps open up the upper back, allowing the shoulders to align correctly. The second step focuses on stretching tight muscles, particularly the pec minor, using wall and doorway stretches to counteract the effects of upper cross syndrome. The third step involves strengthening weakened muscles, such as the lower traps and midscapular muscles, through exercises like band pull-aparts and face pulls. Finally, the video emphasizes the importance of forming new habits to maintain proper posture, suggesting simple tools like a lacrosse ball or thumb positioning to remind oneself of correct posture throughout the day.