It's that black squiggly thing that I want to see in close up, see original post in this thread. For the record, I still have no idea what it is, but, it was that which first caught my attention when idly looking at the ROV footage for the first time. Call it luck but, without that I would have simply accepted that the footage contained 'wire and rope' and nothing else of interest.
We shall soon find out.
And good luck to Ric, Wolfgang and all the rest of the expedition, stay safe.