I think I found it.
Flo #7 Will Miller of App State vs #22 Mac Church of VT.
Clocks in at 22 minutes. It did include several challenges and reviews, including a TD that was called in SV but then wiped off after review. In the first TB period, Church rode out Miller the whole 30 seconds. Church chose neutral for the second TB period and ends up winning on a stall point.
Starts at 47:15, ends at 1:09:15. At first I thought the Vito/Fix final would have it beat (which it did in total time at 25 minutes, but it included blood time).