It is difficult due to lens parallax to accurately judge the distances, clearances and heights solely from that movie. The pilot has freely admitted to a litany of bad calls and errors, but was he did that was right was he flew the aircraft right onto the ground. IMO that is the biggest lesson a low time pilot (glider or powered) should take out of this. As long as you have a controllable aircraft, your fate is still in your hands, so make it happen!