Well, if we believe J didn't write any of the latest, articulate and carefully crafted Twitter responses himself because they don't match his usual tone/style/punctuation/spelling, one has to assume that this was their PR person in control. Since this referenced the upcoming video as well, it makes no sense at all that the PR people would have been the ones to pull the video and delete all references to it. They'd be sabotaging themselves really. All evidence would suggest that J wanted the video to be out. Delaying that to build suspense doesn't help his case and makes him look worse. I don't think he would do that, however twisted as the motivations behind his actions might be.
That being said, if Gleam still manages them in some capacity, it would be in their best interest to get his name cleaned up as quickly as possible and it seems that a few steps in that direction were taken today.
Their minions are really worried at this point about the radio silence - I cannot imagine that anyone from the SJ Camp would want that because it just adds fuel to the fire.
Legal reasons could well shut them up however. I just don't think anything else would make any sense at all, given that they tried to sanitize his image earlier in the day and silence doesn't even make their minions happy.