After a lot of research, I found that Youtube do not give application permissions to manage others Youtube Channel. In fact, I think twice about that feature, and I am glad that is impossible, since that would be a security issue. Even if application was only a "limited editor", someone with application control, could upload any video to any youtube-channel that give accesss to it.

So this question is closed, but I will not delete it, because no one did make this question in SOF and therefor, can be useful to someone else.