The web is a very large community and content theft or copyright infringement is almost inevitable. Its painful when you take your time to write your own content and another person starts stealing it,and even making money out of your own sweat.
Fear not,there is a law now against it, and you can request for a take down, the DMCA(Digital Millennium Copyright Act) is a united state copyright law. You don’t even need to have copyright,the fact that the content, or video or picture is yours,you can request for it to be taken down. For a small amount of $10 per month,depending on your budget.
Visit their website for more information. See you soon.