CH-53 helicopter tail enter into resonance and break apart in flight

What happens in this video ?

The tail of this CH-53 helicopter enter into resonance while the chopper was performing a military mission at low level (the video shows clearly the strong vibrations on the tail). The chopper, out of control, crashed and burst into flames.


(Alabama, U.s)
This is a CH-53 helicopter of the Israeli Defense Force/Air Force.
15th May, 2011
Escondido, Ca

Can you upload even more real plane crash videos please?
24th February, 2011