YouTube effective for homeowners and pros?

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We've been finding a great deal of success with YouTube (that we weren't anticipating) for our educational videos on alternative materials for countertops. Anybody have similar channels they've been updating? We're always browsing to see similar companies who are making videos...
Here are a few of our most popular videos:
http://www.youtube.com/watch?v=Tmj-Hc4awwA
http://www.youtube.com/watch?v=gDMh8p7bbdo&feature=relmfu
http://www.youtube.com/watch?v=Ia6jRW3kD7A&feature=relmfu
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