Airfield elevation = 765ft.
Taking the Metars of say 700ft cloudbase, this is 1465ft AMSL.
However, the MAPt for the VOR approach is 2270ft AMSL.
So yes he could have been flying a low level circuit at say 600ft AGL but how did he get down there?
I agree, it's possible. But it would be a complicated way to do it, given that the "official" way to do this would be to fly the VOR approach and then fly the much tighter circuit (at 1500ft AMSL) which is shown on the VFR approach chart. The outward downwind leg (Sierra-Tango) is a long way away from the VOR approach MAPt.
Yet, somehow he did manage to end up apparently at the end of the outward downwind leg.
Too many unknowns....