I have had difficulties viewing the "Lynn Blake" section with impact bag etc. Checking today, I am able to watch the colin Neeman videos (no bad thing, going to work my way through them all! again)
I think I found the problem. Quicktime is having trouble with the 'mpeg' videos in the gallery. The solution I've found is to change firefox to use windows media player instead of quicktime.
In firefox, go to tools->options.
When the dialog opens click on the 'applications' icon.
In the list of 'content types' find the two labeled: