The "useful piece" you are likely referring to is the featurette " Staging the Return
While the main film focuses on the work, the extras provide a moment for the crew—including director Kenny Ortega and music director Michael Bearden—to speak from the heart. They describe a Michael who was sharp, kind, and surprisingly firmly in control of every musical note and lighting cue. It dispels the rumors of his frailty, showing him instead as a focused "Chief" of his craft. Technical Brilliance: Sound and Light
"Extras 1" is where we see the mechanics. It is in these raw clips that you realize Michael Jackson wasn’t just a performer; he was a world-class architect of entertainment.
Ultimately, these bonus features serve as a historical record. They prove that despite the physical toll of his career, Jackson’s creative mind was sharper than ever. He wasn't just a performer; he was the primary architect of every frame, every lighting cue, and every snare hit.
Beyond the Show: Detailed footage of Jackson directing the musical team, band, and crew to ensure every cue and "funk" level met his specific standards.