Wow. I am completely amazed by how much some of you guys were able to learn from that short video. If you know the a/c weight, environmental conditions, STR for the engines, true wind, airspeed, and the control inputs he was attempting (note that Chuck asked, he didn't try to tell) then you can venture a reasoned, well-informed guess at pilot error.
If you don't, then you could consider waiting for their board's report. Until all the facts are in, you also might want to think about giving that crew the same benefit of the doubt that you would want folks to give to you.