Black is an effective background color for most movies. You can set a movie characteristic that prevents the movie from being edited or saved by any QuickTime application, you can conceal a movie's URL by embedding it inside a poster movie, or you can conceal a movie's URL by embedding it in a decoy movie. You can combine these methods by copy-protecting the poster or decoy movie as well. Add your logo to the movie and include a live link back to your website. QuickTime makes it easy to do both.
Every copy becomes free advertising.
If every copy of your rock video is a clickable link to buy the CD. . . People love to copy things. Use viral marketing to make this force of nature your friend. Ahem, that said. . . They can then use the plug-in to copy your movie from their Web page.