At what point in the approach did the aircraft sink below the Glide Slope and the Pilot and LSO's detect the aircraft was not correcting that deviation?
Check the video timeline and see how little time exists between that determination and the time the Pilot ejected and the time it took for the aircraft to strike the Ramp.
That suggests the demand for additional power came late in the approach remembering the Throttle was in Manual thus the Computer flying the aircraft had a constant power setting right to that point.
We call it Pilot Error....but a lot of things happened to set him up for failure.
As the Pilot he has the final repsonsibility not the LSO's although one can argue the LSO's have ultimate authority if they issue a Wave Off command.
Did the Pilot advance the Throttle at all before ejecting.....or did he not have the time to do do?
We know Navy Carrier Pilots receive training about the importance of making a Ejection decision when things go wrong as even with modern Seats delay can fatal.