I have the full-resolution "Wire & Rope" video available for anyone who wants to see it. Send me your request via email to tigharic@mac.com and I'll send you a link to TIGHAR's public DropBox folder where you'll be able to view the video. There's no timecode on the full resolution version. The time code was added to the half-res "proxie" version posted on YouTube for ease of reference. You can download the file from Dropbox if you want to but it's 5.36 GB so be careful what you wish for.
I've studied the video (yet again) and there are still no airplane parts, body parts, or musical instruments there as far as I can tell. I do, however, see that toward the end of the video the ROV inadvertently dislodged the piece of wire or whip coral or whatever it is. You can see it in the YouTube version. Look at the before and after views included here.
The first shot shows the object as first found. The white arrow points out a chunk of coral that is holding the whatever-it-is in place. At 8:02 into the video the ROV swims in to get a closer look but, because the ROV is small and the current fairly strong, the operator has a hard time holding the ROV steady and he bumps into the coral, inadvertently dislodging the object which flies up past the camera (13:44:12;11 in the YouTube version). The ROV pulls back and in the second shot you can see that the piece of coral has rotated and the object is gone. In the third shot, one second later in the video, the object can be seen lying on the bottom where it landed a meter or two away. About all we can say is that the object is not buoyant and did not break apart after it was knocked loose from where it was.