I re-watched the condensed broadcast, and this guy's film room video:
Yes Niblack was absent. Probably relates to Juan Davis being all over the place in the blocking game--had a 1-2 targets that did not hit. On one score he neutralized an edge. Deondre Moore was also on several snaps and had the 1 TD called back. Cook and Wingo were on several snaps but mostly running DB's off the targeted areas. Per this guy's video--although many described Michigan as giving us multiple fronts, there was still a majority of snaps in cover 3, and he shows how Sark just carved up what was given over and over. Also a great explanation of how Sark tried and end around that did not hit, and then went back to it again with Wingo and presented it different with two different pre-snap alignments that got Michigan into too many shifts.
Related--I know the OTF crew discussed why they don't have game film featured on the channel but can't recall the answer. Clearly other channels do film study and work out the copyright issues.