Check the date on the post
That video was online in mid May but probably isn't available any more. Let's hope a new video will be available soon. The last one was very good and the new one will probably be even better. Also, you might want to check the listings on the Discover Channel. I've read they've been working very closely with Scaled Composites to document SpaceShipOne. I don't know when it'll air (probably later this year), but some info is available at the end of this article.