The sequence of autos looks like a normal progression - AR 1 and 2 into wind, normal auto speed, AR 3 perhaps low speed auto (looks steeper on the line), AR 4 a 360 turning auto - leads me to suspect AR 5 and 6 were PFLs (practice forced landings) where the simulated engine failure is given and the student has to adjust speed and AoB in auto to make a suitable field.
Perhaps he went for the field before the crash site, flew a poor profile and then made the decision to go around far too late - they certainly hit the ground hard so maybe the instructor reselected FLY too late to allow the engine to spool up quick enough.
As Jeepys says - rule 1 applies but we've all had to compromise on occasions when suitable areas aren't plentiful.