I can only speak for the the youtube channels I run. Youtube doesnt support downloading of videos. If you do so, it would be of your own doing. Technically, your not stealing. You can make that call. Im sure Im stolen from all of the time. I watermark my videos so in a way, its free advertising (its a sad silver lining) At any rate, If you like a product, support it so they can continue to do what they do.