You may not have control over all the videos, but you do have full control over the info section of youtube.
As you manage to tell every one how good each one is, and what your website is.
Thats a good point John. I think shops should make it clear on You Tube what the source of the video is- it is very very easy to do, just mention it in the description! For example shops such as Great Northern upload footage from test sessions they were personally at in China, Firework Factory use a mixture of self shot footage (you can hear them doing a commentary) and stock footage.
Its really just a case of putting in the description "Here is a single Turbo Box being fired from out trip to China", "Here are two Golden Shower Cones in action we filmed in November ... " etc ..