My name is Chris. You need to go to http://www.nonprofittips.com/is-my-web-sit...ve-checklist-1/ and read it. The only thing you did correct is not make the video autoplay.
I see lots of junk in your site code. It's bloated, contained things that aren't valid HTML, XML, etc... Awful, awful site. and I'm positive I'll go elsewhere if something happens to my SIO2PC cable, like atarimax.
It's obvious you have no experience with HTML, CSS, etc... You've alienated the 20% or so who use something other than IE on Windows, plus every Mac user by designing your site this way. Never mind that fact that the Office like code Expression Web spits out doesn't even work in IE half the time.
I'll repeat it again, you know NOTHING about web design and coding. Instead of fixing it to work correctly, you blame Firefox for your spaghetti code made with Microsoft's crappy web editor (that no professional will ever touch, I might add!).