Do i have the rights for a Youtube downloader in USC?

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http://askubuntu.com – i have made a media converter called format-junkie, participated at the ubuntu app showdown. I am wondering if i add to the program the ability to download a youtube video and maybe convert it at mp3, will the program be able to be in USC at ubuntu 13.04? Or i don't have rights for something like this? I am wondering cause I THINK, minitube has the ability to download to youtube videos.. (HowTos)