Jefferson is responsible for most of Millsap's scoring efficiency. If Sap were the one double teamed, leaving Jefferson man to man post play, then Jefferson would shoot 60+ % & Sap <40%.
Play 1: Jefferson double teamed, allowing Millsap prime scoring position from the block.
Play 2: Jefferson assists to Millsap.
Play 3: Jefferson defers to Millsap's better position. Nice move & score by Sap, horrible help d by MIA.
Play 4: Jefferson double teamed with triple team coming after Sap gets the ball. Nice move by Millsap for a semi-off balance shot.
Play 5: Williams make an incredible pass. Sap layup. "& how much better does Deron Williams make Paul Millsap?"
Play 6: Designed play. Jefferson assists the lob layup.
Play 7: Deron Williams collapses 4 defenders in & assists Sap's layup.
Play 8: Right place right time. Jefferson screens for Sap cleanup.
Play 9: Good team execution. Sap layup.
Play 10: Over the top of PnR focus on D-Will, help defense can't leave Jefferson to cover Millsap, but he get's the stat.
Play 11: Jefferson & D-Will double teams allows Sap an open jumper.
Play 12: Millsap passes up a nice assisted jumper from Jefferson to drive & score.
Play 13: PnR with Jefferson leaves nobody to guard Sap. Open jumper again.
Play 14: Ilgauskus leaves Millsap on the baseline with the ball to double team Jefferson, leaving lane wide open for Millsap.
Play 15: Nice off ball read by Sap & assist by AK for easy layup.
Play 16: Poor defense leads to Millsap's man covering CJ, who passes to wide open Sap for a layup.
Play 17: Double team Williams, leaves Millsap wide open.
Play 18: Another wide open 3.
Play 19: Another 3. Nice shot.
Play 20: Hero
How much of this is serious? Of the serious portion, how much is a direct consequence of a recent head injury?
The bold isn't worth addressing. As for your description of the plays in the posted video:
Play 1: Lebron sagging off AK, Bosh gambling on the pass from Raja (that is, AJ is not being double teamed). Millsap finishes over Joel Anthony helping off Jefferson
Play 2: Jefferson assists to Millsap. Spot on. That's a rare play for Jefferson for two reasons: 1) Jeff generally holds the ball long enough to let the defense set, minimizing the space available to cutters; 2) Jefferson has only shown a consistent ability to make passes to the perimeter on the strong side with his back to the basket.
Play 3: Jefferson defers to Millsap's better position. Nice move & score by Sap, horrible help d by MIA. Defers isn't how I'd describe the play. Paul does a better job facilitating from the high post than Jefferson. This high low play, however, was executed very well by Jefferson.
Play 4: There is no double team on this play either (certainly not a triple team). The Heat wings are sagging off the Jazz wings, Ronnie Price and rookie Gordo (er...); Udonis is going way under the screen, giving Paul the deep 2 if he wants it.
Play 5: Skipped a nice iso play by Sap for some reason. Then the nice play by Deron. Paul does a good job sliding into a spot where Deron can make the pass.
Play 6: Another nice high-low executed by Jefferson. Sloan certainly was trying to run more through Jefferson in the high post at the start of the 10/11 season.
Play 7: Again, discounting Paul's ability to be in the right place, helping create an opportunity for Deron. Deron with the pretty play.
Play 8: Right place right time. Jefferson screens for Sap cleanup: Is Sap or Jefferson in the right place at the right time here? I'd argue a bit of both (that's a screen?)
Play 9: Good team execution. Sap layup: Hopefully the coaching staff spends some time this season trying to get the Jazz to set half decent screens occasionally.
Play 10: Over the top of PnR focus on D-Will, help defense can't leave Jefferson to cover Millsap, but he get's the stat: It looks like Joel is expecting Lebron to help here.
Play 11: Again, there is no double team on Jefferson here. Bosh overplays Deron on the PnR, and both Wade and Haslem help hard (letting AK run through).
Play 12: More Jefferson from the high post. He does a much better job passing with the game in front of him than he does with the game behind him. Maybe Corbin uses these sets more next season. They were nowhere to be found last year.
Play 13: PnR with Jefferson leaves nobody to guard Sap. Open jumper again: Does anyone else miss Deron watching this video?
Play 14: Again, no double team on Jefferson. James Jones was helping on Jefferson until Haslem could switch back onto Millsap (there was a momentary double on Millsap, even, and Ilgauskas left too early)
Play 15: Nice off ball read by Sap & assist by AK for easy layup: One of those brilliantly dangerous Ak passes.
Play 16: Some really poor defensive rotations by Miami in this video.
Play 17: Not really a double team. Miami hedging on the PnR, figuring there's no reason to overplay Sap from 25 feet.
Play 18: Another wide open 3.
Play 19: Another 3. Nice shot.
Play 20: Hero