Ah, now this I can explain, but not sure if I can resolve:
The videos are now in Flash format, not QuickTime as originally, due to increased support in all browsers and operating systems (also I'd just wiped my laptop and couldn't be bothered to install QuickTime

). As a result, the files stream - that's the "progress" type bar you see - it shows how much it's pre-loaded I think. Problem is, due to a limitation of the flash format, it's not true streaming in that you can't skip from one point to another.
I think there may be either a new version of flash or some server platform which supports this, but I'm not sure. If it's free and I can do it, i'll update the vids, but i wouldn't hold your breath at the mo!