Also at low altitude, the rotation rate seems to slow down, then he starts a secondary left spin down to impact.
... which was probably extremely fortuitous for the people on the bank!
It's hard to give a logical explanation for what what we see here. The control inputs seem to be sometimes pro-spin, sometimes neutral. As mentioned earlier, it might be helpful to see what was in the program immediately prior to this film sequence. Was a spin (and possible late recovery) on the agenda? Or was it a totally unexpected interruption to the planned sequence, the startle factor took over and blocked out the correct recovery procedure until the very last seconds? There appears to have been plenty of time for the correct inputs to be applied. Whatever it was, the tragedy of the event leaves us all with a heavy heart.