I'm curious about the comments about hitting the engine limits (haven't looked at video yet but will shortly).
I assume that it is at a high enough DA not to be hitting the torque limit first, so does that mean both engines have reached topping, ie are at Max Contingency rating? Is this the norm or are they 'topped down' for this type of operation? With, normally, only 10 minutes or accruable Max Con time in a engine's life, you wouldn't want to be doing it too often.
Now to the video.......