There could be a big problem with one line in the Creative Commons license: "By marking your original video with a Creative Commons license, you are granting the entire YouTube community the right to reuse and edit that video." You would only want to use this option if you don't care about someone taking your work and altering it.
I will use the Standard License the next time I upload a video.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin