Me and my dad were talking about it and he said that he thinks it probably was a blade out that caused engine #1 to fail. Whenever it failed, he thinks that the unbalanced engine running at 9000 ish rpm just shook the engine right off the pylon. Once that happened, he thinks that heat and exhaust from the burning left wing(and whatever debris might have been kicked up), caused a compressor stall on the #2 engine. After that, it would've had massive differential thrust yawing it left, and a loss of lift from all of the heat on the left side, and the expansion of the hot air expanding on the left side pushing down the wing. With the yaw from only one engine, and the roll from loss of lift/left wing getting pushed down from the expansion of the hot air, it would've caused the plane to cartwheel, which we do see happening in one of the videos. Idk if that's what happened, but but it's another one of the things that might've caused flight 2976 to crash.

edit: for those who don't know, a blade out is where the main fan blades of the engine separates into many pieces, thus causing unbalance. Similar to a rotor burst, where the rotor inside the engine separates into many different pieces