Google Product Forums
Re: i got proof i'm allowed to put ads on my videos, but it doesn't
The short answer is that I don't know. Perhaps your friend has a better established channel? or his channel is in good standing but yours is not? or some other reason?
(I'm not sure why you are uploading videos identical to your friend's videos. If you mean that your videos are similar to your friends there could be small differences that make the difference.)