Once while hovering in an S300 I was practically standing on the left pedal, yet the nose just would not turn,...then I looked down and noticed the rpm was at the botton of the green. So, I rolled it up and the nose began to turn.
So, yeah, its possible this guy just had the death grip and overrode the governor? Its not like it hasn't happened before, as there is another video of a guy descending in a 44 due to low-rpm, because he had the death grip while flying through turbulence.
Still, we don't know for certain that this guy had full left pedal applied, so who knows?