If you're talking about the newly-released video clips, they are all already available in both Quicktime and Windows Media, each in three different levels of quality to accommodate a variety of different connection speeds.
Production of the older clips was not nearly as thorough -- most are in only one format (which might be windows, quicktime, or good old fashioned AVI), and in only one quality level. Many of the really old ones don't even have audio.
So while you're at work (on your break, of course), you can view any of the new sets of video clips, which include:
American style Cha Cha
American style Rumba
Bolero
Lindy Hop
American style Foxtrot
Int'l Foxtrot
Quickstep
American style Tango is coming next, followed by Int'l Rumba. Over the course of the next few months, all of the old clips will be replaced. So if you can't view it at work yet, don't worry... you will soon.
Regards,
Jonathan