This user is only newbie in rank, but he is registered over a year ago. Also, if you look at his post history, since reactivating, he's mostly trying to promote his YouTube channel.

In a particular case, it is completely irrelevant whether it is a unique account, an alt of an old member or something else as long as he respects the rules of the forum. Some might say that it's not appropriate to advertise in posts like he is doing, but this is for another discussion.