Inside the mind of Jerry Seinfeld and his latest project

The legendary comedian goes back to his comedy roots, and his favorite Central Park bench, in his new Netflix special, "Jerry Before Seinfeld."
6:03 | 10/06/17

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Transcript for Inside the mind of Jerry Seinfeld and his latest project
Please hurry up and finish laughing, I've got a lot more I've got to do here. Reporter: Before he was getting coffee with comedians -- You've finally done a show about nothing. Reporter: Before one of the most successful sitcoms ever. It's about nothing. Yada yada ought to be the best part. I mentioned the bicycle. Reporter: Before he was married with three kids of his own, Jerry seinfeld was a long Island kid trying to make it in comedy. It was like my gay closet moment where I had to say, mom, dad, I'm -- I don't know how to tell you this -- I'm a funny person. Reporter: His new Netflix special goes back to the beginning. You went back to your original standup routines. And is it true you actually had to relearn some of the jokes? All of them. I was surprised too. There's a little joke in there about the cotton balls. I go to the doctor, before he gives you the shot, puts the alcohol on your arm with the cotton ball. I bring one of mine, maybe you could use this one. It was a great laugh. I couldn't find the funny. Why was it funny? It was a certain timing. There's a -- like a move with your hand. There's a look on your face. All those things have to be there or it doesn't work. It's not just what's on the paper? No, no, that's 2% of it. 98% is the way you do it. So I could read one of your jokes and if it's -- Probably not going to work, no. Reporter: Jerry before seinfeld is the first of two comedy special forth Netflix, part of a mega deal that made headlines when it was announced last January. I'm left-handed. Left-handed people do not like that the word left is often associated with negative things. Two left feet. Left-handed compliment. One of the thing wet see, your first joke. My first joke. Being left-handed. Left-handed. What are we having for dinner? Leftovers. Go to a party, there's nobody there, everybody left. First performance and that joke got applause. And I just froze. Because I didn't know what that was. And that was it. That was -- the sun just hitting you in the eye. You go, that's it. I'm never doing anything else. No other jobs? No, I'm doing this. I don't care. I don't even care if I'm successful. I'm doing this. I love it so much. And you were so good at it. Never a moment where you thought it might not happen? Oh, yeah, lots of moments like that. Lots of them. You must have known something, though. It's one of the most amazing things in the special. We see all of the yellow pads. You've saved every successful joke? George, what else did I have? I don't know. Nothing. A couple of people hive asked, why did you save it? What else would you save? What else? I don't have jewels. I don't have nice clothes. But the material. The hardest thing in all of entertainment is to write standup comedy. It is harder than anything else. After years of performing in clubs, seinfeld finally made on it "Johnny Carson." Who designed pajamas, why do they make them look like a tiny suit? Imagine NBC, you have a kid going on "The tonight show" with Carson and late night with Letterman three, four times a year, both shows. They never once went, maybe we should talk with this young man. Come on. No. Nothing. They never talked with me. You never pitched to them? No. How come? They were doing "Alf." They were doing "Cheers." Of course NBC did finally give seinfeld a shot and a series. And almost 20 years after the finale, it's still seen all over the world. So what happens when you're at home? It's hard to miss sometimes, if you're just clicking. Do you stop -- No, I can't. Can't touch it? Maybe like two lines, then I got to go. My daughter to annoy me last night was playing the theme song of the show. That's kind of mean. Yeah, she wanted me to come in her room to talk, I said you come in our room to talk. And we were having a fight about that. Who would go into whose room? So to get me, she blasted the theme song of the show. And you went to her room, of course you did. And more than 40 years after his comedy career first began, he still loves the work and the rush. Tell us how it happens. You have an office. I still do the same exact thing. You put the pad down -- Same pad, bic pen, clear barrel, blue. And just wait. I don't just wait, because I have things I want to talk about. Like I want to talk about when you're texting. The three ghostie dots. Why are we so anxious? As if before the phone rang it went "Brr." You tried all these different things but you always go back to the standup. I was like a raccoon to my parents. You know there's one around, but no one's tracking the actual whereabouts. That's just the meat and potatoes. I don't like that analogy. I would say -- it's the heaviest drug. Wow. I would describe it as the heaviest drug. It's not just sustenance, it's euphoria? No, no, it's the rush. There's no rush. In these other things. There's satisfaction. There's accomplishment. But that mainline "Whoa" rush. Friday night in Kansas City. Saturday in Toledo -- Doesn't matter. No one ever said that before. And I just said it. And they just liked it. Boom. Now that's an addiction. Our thanks to George Stephanopoulos. "Jerry before seinfeld" is currently on Netflix.

This transcript has been automatically generated and may not be 100% accurate.

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