It just looks like a classic false g/s all the way down to me or am I over simplifying ?
This doesn't fit a "classic" false g/s. A classic false g/s would still descend to the correct runway threshold, just at a (much) steeper angle. A back course g/s was suggested earlier in the thread but that explanation doesn't seem to fit the descent profile either.
That could conceivably be interpreted as either 900m before the end, or 900m beyond the end.
Well the translation if correct also included "the plane flew over the
entire runway" which suggests the impact point was 900m beyond the runway end.