YPP applications are currently in a backlog, you should hear back by the end of June. Here's more info on what we're doing to get through our current backlog: https://goo.gl/7j1KXt . Thanks again for your patience.
If you were eligible & applied before June 1st, then you should be receiving an email update in Creator Studio with more info. If your application is being held for an additional review, then you'll get a second update in the near future! Latest update: https://goo.gl/2icqfh