Based on where the engine was afterward (about 70% down the runway), it was likely they were well above V1: the decision point speed. Above this it is unlikely that the plane can stop on the runway and it’s better to get into the air and try to fix the problem. Based on some new video it looks like the middle engine was in a compressor stall and not producing full thrust. I don’t know if the MD-11 (a trijet) can get into the air with only one engine.
Based on where the engine was afterward (about 70% down the runway), it was likely they were well above V1: the decision point speed. Above this it is unlikely that the plane can stop on the runway and it’s better to get into the air and try to fix the problem. Based on some new video it looks like the middle engine was in a compressor stall and not producing full thrust. I don’t know if the MD-11 (a trijet) can get into the air with only one engine.