I watched the vid at your link. It is hard to tell what happened but first, it can’t be good and second, 90 some percent of what went on looks out of control. Near the beginning something blew and then most of the rest of the footage shows water with discolorations and junk in being propelled in every direction (styrofoam seemed to be the main ingredient). Several times I thought I saw a large quantity of something much darker shooting up from the bottom of the screen which I assume could be oil.
If I were forced to guess what I saw, I would say the riser(?) at the beginning (the equipment we’ve seen so often with the muddy water billowing out of it) was see sawing around, then there was an explosion and then all the stuff that they had jammed down the hole came out. Toward the end, with a bit of clearing, it looked like whatever was shooting out from below (oil?) was doing so at an increased volume and force. Finally, at the very end we got a look at an ROV but I could not tell what it was doing.
Is that what you saw?
Where I said “riser” should be BOP, I guess. Can’t follow all these unfamiliar terms and acronyms...