The Hollywood Reporter obtained several of the not-yet-released clips, one is embedded below:

Each contains a snippet of an interview, usually some historical footage of the TV shows the interviewee was responsible for and, naturally, a plea to purchase the book, “Primetime Propaganda” by Ben Shapiro and published by Broad Side, an imprint of HarperCollins.

In one video, Friends co-creator Marta Kauffman says that when she cast Candace Gingrich-Jones, half-sister of Republican former House Speaker Newt Gingrich, as the minister of a lesbian wedding, “There was a bit of ‘fuck you’ in it to the right wing.” Kauffman also acknowledges she “put together a staff of mostly liberal people,” which is another major point of Shapiro’s book: that conservatives aren’t welcome in Hollywood. Maybe that’s because they’re “idiots” and have “medieval minds.”

At least that’s what Soap and Golden Girls creator Susan Harris thinks of TV’s conservative critics. However, the ranks of dumb right-wingers has dwindled, according to Harris, whose video has her saying: “At least, you know, we put Obama in office, and so people, I think, are getting – have gotten – a little bit smarter.” Some of the videos have executives making rather obvious revelations, like when Larry Gelbart and Gene Reynolds talk about pacifist messages in M*A*S*H or when MacGyver producer Vin Di Bona says anti-gun messages were a recurring theme in that show.

But an additional video has Di Bona, who also created America’s Funniest Home Videos, becoming remarkably blunt about his approval of a lack of political diversity in Hollywood. When Shapiro asks what he thinks of conservative critics who say everyone in Hollywood is liberal, Di Bona responds: “I think it’s probably accurate, and I’m happy about it.”

Another video has Leonard Goldberg — who executive produces Blue Bloods for CBS and a few decades ago exec produced such hits as Fantasy Island, Charlie’s Angels and Starsky and Hutch — saying that liberalism in the TV industry is “100 percent dominant, and anyone who denies it is kidding, or not telling the truth.” Shapiro asks if politics are a barrier to entry. “Absolutely,” Goldberg says.

When Shapiro tells Fred Pierce, the president of ABC in the 1980s who was instrumental in Disney’s acquisition of ESPN, that “It’s very difficult for people who are politically conservative to break in” to television, he responds: “I can’t argue that point.” Those who don’t lean left, he says, “don’t promote it. It stays underground.”

Another video rolling out soon has House creator David Shore acknowledging that "there is an assumption in this town that everybody is on the left side of the spectrum, and that the few people on the right side, I think people look at them somewhat aghast, and I'm sure it doesn't help them."

In the book, subtitled "The true Hollywood story of how the left took over your TV," Shapiro also tells anecdotes of bias against conservatives.

One example is Dwight Schultz, best known for his roles as Murdock in The A-Team and Barclay in Star Trek: The Next Generation.

The late Bruce Paltrow knew that Schultz was a fan of President Ronald Reagan.

When Schultz showed up to audition for St. Elsewhere, a show Paltrow produced, to read for the part of Fiscus, Paltrow told him: "There's not going to be a Reagan asshole on this show!"

The part went to Howie Mandel. "Most nepotism in Hollywood isn't familial, it's ideological," Shapiro writes in the book. "Friends hire friends. And those friends just happen to share their politics."

(Source)