Only three scrums in last 20. At 64:30 ABs get scrum penalty, at 67 ABs have nudge but Boks clear, and at 76:30 ABs get nudge, but Louw stands up taking Williams with him. So scrum wasn't the problem.
As for lineouts in that period, there were 7:
At 60 Vaa'i calls the fandango and ABs confuse themselves allowing Nortje to take ball hardly jumping;
62: FH wins easily
64 Throw goes over back. FH misses lift on Scooter.
65:30 Throw too low to FH and PSDT gets hand in front
71 FH wins at front with throw meant for Boks middle pod
72 PSDT wins
77 Long throw to RD, who wins it but slap back with no control.
So apart from the self destruction at 60 the lineouts were actually even.
Expanding to include third quarter:-
Four scrums:
42 Boks LH collapses (BOTH knees on ground), Gardner should have called a penalty against green. After his sin is ignored Wessels managed to regain his feet ABs scrum retreats creating ILLUSION that new Boks props are dominant;
50 (Newell and Williams now on) ABs get weight on and win hit. Reinach declines to feed a retreating scrum and ref awards free kick for early push. At worst a technical issue.
52 Newell appears to pull on Wessel's bind. Wessels's elbow touches ground (on its own penalty to ABs) and scrum goes down on that side, for which ref penalises ABs. @NTA reckons Louw's elbow pointing down so probably guilty of same thing. Again own goal at worst.
56:30 (McAllister on) Ref goes round to look at Wessels. Ball in by ABs and cleanly hooked.
There were 5 lineouts:-
49 Clean take Vaa'i.
51 Vaa' steals one from Nortje off Boks throw.
5[7] Clean win by RGS off Bok throw
58 McAllister makes good throw to Scooter, but Wally in blocking position and rightly penalised. Own goal.
59 Nortje takes Boks throw cleanly.
Summarising second half:-
Lineouts (12)
ABs throw 7
3 takes, 2 clean 1 messy
One poor throw (McAllister)
One technical fail (Sititi)
One lift missed (Holland)
One absurd call (Vaa'i)
Boks throw 5
3 clean takes
2 AB steals (Vaa'i, FH)
A mixed bag and main AB issue over-complication between 58 and 60 for potentially 14 point swing.But didn't settle down until 70.
Scrums(7)
Boks got two pens (one which was wrong way around), and one free kick, which Parsons reckons Boks milked out of ref
ABs got one pen, but ought to have had two and maybe three.
Of 'unsanctioned' scrums, ABs cleared cleanly on their other put in and Boks cleared under pressure on their two others.
To the casual observer the Boks scrum at 42, which was in fact a penalty to ABs, has created the illusion of Boks dominance in second half. BTW I felt AB scrum always under pressure in first half, but have not rewatched.
IMO Wessels was under pressure throughout second half, and Louw edged Williams but not one way traffic.
Once Mc Allister came on the ABs had the edge.
The ABs didn't lose this one in the second half in the set piece.