You don't have to download at all, you can watch it online? And that's from Brian Young's site. Your opinion to shape any way you please but over here, at least from what I can tell, people consider him and Sean Robertson to be the authorities on B5 (I know I do).
He would have to download it. It plays back through Mediaplayer or some other video app on your machine. He's had issues getting his edited videos to upload to youtube, so he just stuck with downloadable files.
I'll vouch for him, if it makes any difference. He's not trying to plant a virus on you. And, of course, the video is extremely relevant to this discussion.