One thing to remember when viewing the video of the aircraft is the distance from the camera to the aircraft and the delay that causes between what you see and what you are hearing.
Consider the time lapse between when the aircraft disappears behind the tree and the time you hear the sound of the impact to get an idea of how much lag there is caused by that distance.
As to the NY Crash.....the IP did a very stupid thing and earns the responsibility for that crash and the aircraft should be seen as a victim.
Early on in this investigation there shall be some indication of whether the Rotor Head departed the aircraft or not and depending upon the location of the parts discovered will tend to point to where in the sequence of events that occurred if at all.
The Black Hawk is a proven aircraft and has been tested thoroughly from initial prototype stage right along to today.
As to the aircraft was thought to appear from out of the clouds then ATC should have recordings of any Radio Transmissions to/from the Aircraft as they would have in all likelihood been on an IFR Flight Plan or operating on an IFR Clearance of some kind.
The prevailing weather did not seem to be of the kind that would offer a risk of IIMC.