The reason we don't release these things is apparently that Hollywood contracts come in two varieties: "industry event"-type contracts, and "broadcast reuse"-type contracts. The former is a lot cheaper, but you don't get any broadcast rights. And if Microsoft broke that contract, we'd be sued for a lot of money, and no Hollywood agent would let their actors work with us ever again. That would suck. So if you want to see the videos, you have to come to our events. Sorry
(I only learnt this because it comes up every year on internal Microsoft mailing lists - all the employees who aren't at the event want to watch the videos as well, but we can't!)
