Now please watch the evolution of the west side dust vs the south side dust.
You can clearly see it evolves nothing like WTC2 east because the upper sheet did not neatly tuck behind the lower. You are watching larege free-falling sheets move through the dust along both west and south faces.
Ain't no doubt about it.
Just to be absolutely clear please compare with early evolution of the WTC2 east face, a posterboy for whitish ROOSD ejections unblocked by falling objects:
This white smooth progression is visible because upper sheet fell behind lower sheet. If upper sheet falls over the lower sheet the resulting dust looks like WTC1 west and south, very grey and uneven because there are very large sheet objects falling through it.
The 2 cases, WTC1 south and WTC2 east, are totally different as I hope you can see.
If west and south dust evolve identically it means the large sheets within are falling at about the same rate at the same elevtions.It means they were detached together at the same time from the same elevation. West and South failures happen the same way at the same time.
(THat would have been impossible for WTC2. Think about it. You are staring at proof if you learn to recognize it.)