STOP - Sam Brown
The embedding and use of YouTube video clips can add considerable interest to your website.
The terms and conditions for commercial use of this material can be found at: http://uk.youtube.com/t/terms. In summary YouTube states that they ....
"...don't want to discourage you from putting the occasional YouTube video in your blog to comment on it or show your readers a video you like, even if you have general purpose ads somewhere on your blog."