You're right. I do know that etiquette about not sharing stuff that came in a trade. I also know that if I gave a recording to somebody with the understanding of no release that I would be pissed if that person was sharing clips and talking it up. I would likely never give that person another recording again, and would probably tell other folks (effectively blackballing them).
So no, I don't really think it's good-spirited. If you wanted to get it released, just work out something with the tapers and be straight-forward with them. Playing games online with somebody else's recording doesn't seem smart to me.
I don't think past history of releasing video has any relevance to the gloating on this thread. I've released a bunch of recordings, but if I did the same thing, folks could and would rightfully accuse me of taunting.