I would never have guessed a by lice referred a Creative Commons Licence is.
What is it you want to licence, music sound effects photography?
Do you mean, is a licence required from Apple to place a Keynote file on Youtube? Users are given permission to distribute content using Keynote files. This is contained in the Keynote End User Licence Agreement.
Extract from the Keynote EULA:
The Apple Software may be used to reproduce materials so long as such use is limited to
reproduction of non-copyrighted materials, materials in which you own the copyright, or
materials you are authorized or legally permitted to reproduce.
Title and intellectual property rights in and to any content displayed by or accessed through the Apple Software belongs to the respective content owner.