It was the catalytic converter which happily was still covered by a warranty,so i didn't have to pay.That sucks. Mine came on again just a few weeks after getting hundreds of dollars worth of work done. I feel your pain.
I watched it. There's one or two parts that may be questionable...I subscribe to Anna Akana's YouTube channel. She put out a pretty powerful video today. I don't think I can share it here. I recommend checking it out.