Looks to me like the right engine is making no/less power at that point. Mid and left have smoke trails.
Right engine may have ingested parts from the missing inboard R flap. ...and a bunch of barbed wire and chain link fencing.
I'm just speculating like everyone else, but something seems to have evolved to make an already bad situation worse within the time from fence impact to the crash. The plane clearly climbed out of ground effect, got the gear up, and if able to do that should not have settled back to crash unless there was some loss of control or later loss of power. I watched a 747 stall on takeoff and crash once and was nearly killed by it but for about 5 minutes of time separation. These videos are kind of heart wrenching. Can't imagine being crew going through this.
There was also a small shack on the other side of the road that looked to be made of brick. It almost certainly took it out.
