Video is a fantastic marketing tool and very "hot" with the search engines too. (YouTube itself is like a search engine.)
You can buy a Flip HD video camera for $100-$200, depending where you buy it from (I got mine at Costco for $100). I used to do short video clips for my online consulting biz and the Flip worked great. Excellent definition and all that. And I got a mini tripod for $10 which I just set up on books or whatever.
The real trick is getting the lighting just right, and you generally want direct sunlight on the "subject" (you, the soap, or whatever the focus of the video is).
Hope that helps!
Karri