Looks like the filename had an extra space in it, and it broke the link. Strange. Anyway, it's fixed now.
However, since you brought it to my attention, I noticed that the other two Chase variations -- Twinkle to Flick and Twist Turn -- are not there. I could swear we used to have them, or at least that we filmed them. I'll take a look in some archives and see if I can find them, or references to them. If I can, I'll move the copies back on to the server. If not, I may have to edit the video and put it up.
In the meantime, the double turn chase variation is now working.
Regards, Jonathan Atkinson www.ballroomdancers.com