Is okay to use 'is' instead of 'are' in the case of singular 'you' when we want to make it emphatic?
- Hey, I told you not to come here, didn't i? What is you doing here then?
- I spent all morning cooking! Is you going to eat it or what?
- You've got anything you need! What else is you looking for?
- I'm sick and tired of your games, it's all the same every day! When is you ever going to stop doing that?