Looks like
youtubes age filter that should prevent kids from watching special content (sex, violence, drugs, whatever) is flawed by design. While youtube asks for a registered account with a "valid" 18+ age if you are on their website they do not integrate this authentication in embedded flash files for these categories.
There is a simple
demonstration that let's you embed any youtube video you are not allowed to watch because of your age
[via
dark SEO programmin]