Here is the transcription of the video from 22:49 to 24:19. I include it here to show how easy the maxim (Dare to be dull) is in the context.
22:49 - You're training yourself to get out of your own way. You're working against the muscle memory that you've developed over the course of your life with a vain, a brain that acts very fast to help you solve problems.
22:59 - But in essence, in spontaneous speaking situations, you put too much pressure on yourself trying to figure out how to get it right.
23:08 - So a game like this teaches us to get out of our own way. It teaches us to see the things that we do that prevent us from acting spontaneously.
23:19 - In essence we are reacting rather than responding. To react means to act again. You've thought it and now you're acting on it. That takes too long and it's too thoughtful. We want to respond in a way that's genuine and authentic.
23:36 - So the maxims I would like for you to take from this, and again these maxims come from improvisation, is one of my favorite.
23:42 - Dare to be dull.
23:45 - And in a room like this, telling you dare to be dull is offensive, and I apologize. But this will help.
23:51 - Rather than striving for greatness, dare to be dull. And if you dare to be dull and allow yourself that, you will reach that greatness.
24:02 - It's when you set greatness as your target, that it gets in the way of you ever getting there. Because you over-evaluate, you over-analyze, you freeze up.
24:12 - So the first step in our process today is to get out of our own way.
24:17 - Dare to be dull.
Best Answer
The phrases in use are "how are you doing?" (with the 're contraction, usually, since it's a conventional phrase), and "what's new?" or "what's the news?". I've never heard "how's your news?" said by a native speaker (I just checked your pointer to the wiki article: that's a very specific use that doesn't extend to ordinary speech and sounds strange even as a professional question).
In the phrase "what's the news?", is is used because "news" is what's known as a collective singular. Collective singulars have a plural form, but are seen as an aggregate, thus taking the singular verb.
English doesn't use "new" as a noun, it's always an adjective in singular form. Saying "what's the new?" where "new" is a noun (as opposed to "what's new?", where new is an adjective), sounds very strange and unnatural.