Horse link again!?
First of all, I don't think that footage was shot in HD mode. Just because I've seen it on the nikon website, and it looked low res.
Second, if you are referring to 'better' as meaning no signs of wobble. That horse video really didn't have the type of camera work (pans with straight adjacent elements) to judge from.
no, I just added &fmt=18 onto the end of the url. It just bumps the quality up a bit.