NaN:NaN message when trying to play video

Hi,
I’ve been trying to load several videos, in multiple versions (mov, mp4, wmv). I could not get them to load and I used the plugin and that worked great. But now when I click on the videos on the page, it’s just a blank black screen and when I look at the time notation at the bottom, it says 00:00 NaN:NaN. I’m not sure why they are not working, when I play them on my computer they work fine and I loaded them to Youtube and they work fine. I’ve tried embedding them into the page and also using a video player (Huge IT) and nothing works. I have plenty of other videos on the site and all of them work fine.

Help!