You are just making things up again. You can hear the guy at 3:25 saying they are starting at threshold. DOESN'T SOUND LIKE A WARMUP TO ME.
Other people here have said it was designed to be an easy workout - dude at 3:35 "definitely going to be a tough one".....clearly it wasn't designed to be an easier workout. They also are talking at 7:43 about how high their level of strain was, all agreeing they were working hard - they agreed 18-20 out of 21.
You can hear at 3:15 in the video tinman says 400 jog rest (looks to be slow jog, around 2 minutes) between the 1200 reps. At 7:18 you can hear Hunter say 5 min jog after the 1200s. If they wanted to get any aerobic benefit from the 200s they wouldn't have taken full rest.
I don't know where you get 80% from, their strain level in the video on the first rep is shown to be 10.2 out of a max of 21..................
Aiming for 3:25 average and they actually hit 3:45, 3:36, 3:27, 3:17, 3:05. They only came within 7 seconds of their goal average pace in ONE REP.