Single Ladies tribute video. However, YouTube's recent addition of the Creative Commons licensing option just made it a whole lot easier to make mashups without stepping on anyone's stiletto-sporting toes. Users are now given the option to choose between YouTube's standard license or the Creative Commons Attribution (CC BY) license, which, when selected, automatically adds the video to a library of similarly appointed videos, now available for your cutting and captioning pleasure. An attribution is placed beneath any video sourcing material from the Creative Commons library. Among the more professional outfits adding their videos to the CC pool are Al Jazeera and C-SPAN -- who's ready to see Mittens the Kitten and Sarah Palin battle it out over tax cuts? You can now access the Creative Commons library through the YouTube video editor.