First impression: site breaks all over the place (Firefox, Mac)
Looked at your source code; it's a mess.
Tested home page code: 213 validation errors. oofa!

style sheet includes belong in the <head/> only... wow too many other things to comment on.
Get a book on how to write code and start from scratch.

Content: what's going on? looks like all of your images are video caps; where are the videos? Ahh I see, click the titles. Well it may help to make the images links to the article/video pages as well.

Whoa boy! I am on high speed DSL and am told I need a faster internet connection to view videos. Bad bad bad. Yahoo video, YouTube, MSN, Apple QuickTime movie trailers all play fine on my connection, why don't your videos? You're breaking your promise to deliver video content and you're blaming it on me.
Get a book on video compression. Start from scratch.

Why use a title like "File your Comment" then hide the form? You're really starting to annoy me now.
Get Steve Krug's book: "Don't Make Me Think" and start from scratch.

On your "Featured Experts" page, why not provide links to the videos that they are featured in? You got me interested in a particular guy, now I want to see what he has to say... do I have to hit all the videos and try the 'pot luck' method?

I think this is a great concept, but you really need to work on the usability and technical aspects of how the site functions. Spend some time having people test the site and pay attention to where they get lost. Then fix it. If you can't figure it out yourself, hire a consultant or keep pinging this forum (a lot).

good luck

__________________
amorphic8
http://www.amorphicmedia.com