My hearing is not good enough to follow the speech, but it was always clear that the New Covenant contrasts with the old covenant, the Law given to Moses.
The New Covenant is for forgiveness of sins. . In the unlikely case that wt would once be right, and the Other Sheep would never die (starting in 2075), then they would need the New Covenant more than the anointed, who will have to die to go to heaven, paying the price themselves.
The Priests and Kings had their additional covenants, but they too had to be in the Old, or New Covenants first to get that additional calling.
Does it matter? yes, because the memorial emblems represent the new covenant, freedom from sin for all, not just the 144 000. All should , must partake, it is even allowed for the partakers, the wt anointed.