Since the Napster trials in late 1999, content producers have become increasingly aware of intellectual property issues. Even then, the Recording Industry Association of America (RIAA) tried to send the message that the Internet had made widespread piracy possible, and that it was leading to enormous losses in revenue for the music labels and artists.
In addition to direct losses from piracy, content producers today face an even greater challenge when it comes to controlling how their work is distributed. It's quite common for anyone who admires your video to simply repost it on their site. Generally, this isn't a big deal - it's flattering and it provides a mechanism for increasing the visibility of your work. Unfortunately, this redistribution can also lead to a poor perception of your work and it can also dramatically increase your web-hosting costs.
With that in mind, I'd like to introduce "The Golden Rule":
Anyone who can watch your video can steal your video.