This example merits one of those "big words" we should refrain from using often ... egregious. But just because this site made a really bad example doesn't mean the web isn't full of a lot more extremely clumsy video download interfaces. I very seldom click on anyone's video download simply because I never know what issues will show up ... and what "hoops" the web designer will force me through. Here's about $10,000USD worth of consulting advice I'll give away to all the "we know best" geeks out there:
1. Don't query about what viewer they are using. That's their business, not yours. Use a standard format or use multiple links for three or four of the major viewers. Save you time, enhances the viewers experience.
2. Don't query about speed. Start the D/L immediately at a dial-up file size/resolution and let the media be it's own tester. In only a few seconds you can measure what has been D/L's and if the customer has a fast link just shift to the high resolution file.
3. Provide a download link for the media that doesn't open a viewer so the client can D/L in the background and view it later. Why be so afraid the client might have a copy of the video independent of your site? If you have your contact/marketing info on the vid, doesn't the "free copy" provide a potential viral marketing piece that will circulate independently and draw more visitors/sales?

Stop making it hard for the customer!

Uhg what they're using is so 90's... :)