I sent it to a friend of mine that was a Spanish Major and is a pilot. Not word for word, but here is the summary:
At first, he's describing what he's seeing on the security camera.
Then he's saying he thinks it was a loss of control, maybe a major malfunction of the flight controls.
He's asked why they didn't communicate the problem, and he responds that due to the low altitude and low controllability, the crew was focused on flying the plane. He's describing the "normal" communications between the plane and ATC. He said it's very unusual that they didn't report any problems, if they were having them earlier. That if he were having such problems earlier, he would have reported them to ATC.... that's about it.
The guy speaking is the former president of the Mexican pilot Union, as far as he can tell and is a Captain somewhere down there.
As far as I know this guy has nothing to do with the investigation and is about as reliable as CNN's "expert pilots." So I wouldn't read to much into it. I know it's hard, but the NTSB will let us know what happened in due time.