Watching the LiveLeaks video from the left side, you can hear what sounds like wind whistling right when the aircraft rotated and leaves the ground. Soon after, the wind sounds stops and the plane comes back down sans gear. Reminds me of DAL 191: “you’re gonna lose it all of a sudden” when the L1011 enters the rain shaft and encounters a strong headwind. The headwind shears to a downdraft, and all the airspeed is gone. For both aircraft, the time betweeen headwind and downdraft is quite short.
Anyone have the expertise to tell if the rotation point is before what would be expected of a plane at this weight in those conditions? If it rotated too soon, it may be because the pilots got the headwind and thought they got a nice “bonus” on takeoff only to lose it.