We have no further comment about this, beyond saying that the poster is correct: it's up to the public to monitor things like NASA'S Stereo video output as long as we can.
The video mentions that the object should reach earth around January 3, 2012. If this is real, you can see the outlines of object, but you can also see through it, which indicates a possible cloaking mechanism?
Just for the heck of it, I googled "UFO sightings on January 3, 2012". Here are just a few that popped up during the search:
This video is dated December 27, 2011, and the estimate on the time of arrival here assumes that the object continues at the same rate of speed and trajectory. Let's just put this assumption aside for a moment and see a video shot on December 28th, 2011 in Turkey:
I also remembered that there was a meteor shower on the night of January 3, 2012, the Quadrantids. Just speculating here, but a meteor shower could provide 'cover' both physically in the form of a distraction, as well as a good explanation for any reported UFO activity on that night.
Of course, all is open to question. Gosh, this is fun! :-)
Cosmic Librarian : thanks for the links. And Whitley, have you noticed that the object in question is a double tetrahedron or double kush (Sumerian) and have you heard from Richard Hoagland about it?
I'm not sure why the Youtube poster claims that "NASA cut the feed", as these images are still very much available from NASA's STEREO website (The video presented is actually a slideshow of the images, not part of a video feed that could be "cut"): http://tinyurl.com/4de5j6b
Select "Behind HI2" in the Telescope field, and make sure the image resolution is set to "1024x1024", there doesn't seem to be any 2048x2048 available. There's a slideshow option there as well, to re-create the original videos for yourself. Try loading "20111227" and "20120112" to see the progression of the artifact.
This artifact does indeed show up in a number of the images, and it's position and alignment are consistent with that of a lens flare caused by a bright object in Venus's position in the image. The artifact's apparent right-to-left motion is caused by Venus moving into the frame from left to right--watch the apparent motion of the planets over the course of the video. As Venus moves toward the centre of the image, the artifact does as well, in symmetry with Venus's image.