The video is edited. From simple examination, the jet was super
imposed on top of a cruise missile launch, probably a TLAM. You can
see the nose of "aircraft" is rounder as it broke the surface, then
it became sharper into the nose of an F-15.
Also, there appears to be no water trails and streaks from the
wingtip as lifted off. The aircraft's initial boost, believed to be
a rocket assisted take off, is actually the rocket boosters of a
TLAM. The remaining flight path also resembles one of a launching
TLAM. As you can see, there is also no rocket assisted take off
equipment strapped on to the plane.
The yawing of the plane 3seconds after it was boosted into the air
also looks suspicious.
My conclusion, its a hoax, but a very nicely made one.