Live local radio reports from eyewitnesses said that the helicopter began to spin uncontrollably, flipped upside down, and fell like a rock into a wooded area. The main part of the wreckage was engulfed in flames, and the tail section landed in some trees.
Some Freepers suggested that the description sounded like tail rotor failure, and that it is possible to take down a chopper by shooting it's tail rotor.
See posts 605, 630, and 611 for the time in the video and how to spot the guns in the video that they try to cover up.
See posts 603 and 604 for how to spot what looks like dynamite and the time it appears in the video.
Other posts there describe how to find what looks like a wrist rocket and what looks like possibly other anti-aircraft weaponry in the video.
https://www.freerepublic.com/focus/news/3579255/posts?q=1&;page=601