Symone D. Sanders, a former adviser to President Biden. (NBC News also has separate digital offerings for hard news and lifestyle coverage.)

For news executives, finding a winning formula in the streaming game is now an urgent priority.

Streaming has supplanted cable as the main home delivery system for entertainment, often on the strength of addictive series like “Squid Game.” For a while, though, old-fashioned cable news clung on, with CNN, MSNBC and Fox News attracting record audiences in recent years. In case of emergency — a pandemic, civil unrest, a presidential election, a Capitol riot — viewers still tuned in en masse.

After former President Donald J. Trump left office, news ratings nose-dived and cable subscriptions continued to plummet — an estimated four million households dropped their paid TV subscriptions last year, according to the research firm MoffettNathanson.

Fox Nation and CNN+ both rely on a business model dependent on paid subscriptions, hence the efforts by both to generate a wide variety of programming.

“A subscriber every month only has to find one thing that they want,” Mr. Zucker said in the interview. “We don’t need the subscriber to be interested in everything we’re offering, but they need to be interested in something.”

Mr. Zucker said CNN+ was aiming at three buckets of potential subscribers. He is seeking to entice loyal CNN viewers into paying for streaming programs featuring hosts familiar from the cable channel: Anderson Cooper will have two, including one on parenting; Fareed Zakaria is helming a show examining historical events; and Jake Tapper will host “Jake Tapper’s Book Club,” in which he interviews authors.

The other would-be subscribers, Mr. Zucker said, are news and documentary fans who want more nonfiction television, as well as younger people who don’t pay for cable.

CNN, though, is not ignoring the needs of its flagship cable network, which ranked third last year behind Fox News and MSNBC in total audience.

Mr. Zucker recently reached out to representatives for Gayle King, the star CBS News anchor, about the prospect of her taking over the weekday 9 p.m. hour on CNN, said two people with knowledge of the approach. CNN has not named a permanent anchor for the prime-time slot since Mr. Cuomo was fired in December after revelations that he assisted with the efforts of his brother, former Gov. Andrew M. Cuomo of New York, to fend off sexual harassment allegations.

CNN+ is also expected to include the breaking news and political coverage that CNN viewers are accustomed to — a feature that could pose difficulties for the network down the road. CNN commands a high price from cable distributors, who may cry foul if CNN+ includes too much news programming that potentially competes with the cable offering. For instance, Wolf Blitzer, the host of “The Situation Room” on CNN at 6 p.m., will also appear on CNN+ to anchor a “traditional evening news show with a sleek, modern twist.”

CNN’s parent company, WarnerMedia, which is on the verge of a megamerger with Discovery Inc., appears willing to take the risk. The company is placing a significant financial bet on CNN+, budgeting for 500 additional employees, including producers, reporters, engineers and programmers, said Andrew Morse, CNN’s chief digital officer. The company is also renting an additional floor of its headquarters in Midtown Manhattan to accommodate the hires.

“What we’re building at CNN+ is not a side hustle,” Mr. Morse said.

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Covid Test Misinformation Spikes Along With Spread of Omicron

On Dec. 29, The Gateway Pundit, a far-right website that often spreads conspiracy theories, published an article falsely implying that the Centers for Disease Control and Prevention had withdrawn authorization of all P.C.R. tests for detecting Covid-19. The article collected 22,000 likes, comments and shares on Facebook and Twitter.

On TikTok and Instagram, videos of at-home Covid-19 tests displaying positive results after being soaked in drinking water and juice have gone viral in recent weeks, and were used to push the false narrative that coronavirus rapid tests don’t work. Some household liquids can make a test show a positive result, health experts say, but the tests remain accurate when used as directed. One TikTok video showing a home test that came out positive after being placed under running water was shared at least 140,000 times.

And on YouTube, a video titled “Rapid antigen tests debunked” was posted on Jan. 1 by the Canadian far-right website Rebel News. It generated over 40,000 views, and its comments section was a hotbed of misinformation. “The straight up purpose of this test is to keep the case #’s as high as possible to maintain fear & incentive for more restrictions,” said one comment with more than 200 likes. “And of course Profit.”

Previous spikes in pandemic-related falsehoods focused on the vaccines, masks and the severity of the virus. The falsehoods help undermine best practices for controlling the spread of the coronavirus, health experts say, noting that misinformation remains a key factor in vaccine hesitancy.

The categories include falsehoods that P.C.R. tests don’t work; that the counts for flu and Covid-19 cases have been combined; that P.C.R. tests are vaccines in disguise; and that at-home rapid tests have a predetermined result or are unreliable because different liquids can turn them positive.

These themes jumped into the thousands of mentions in the last three months of 2021, compared with just a few dozen in the same time period in 2020, according to Zignal Labs, which tracks mentions on social media, on cable television and in print and online outlets.

The added demand for testing due to Omicron and the higher prevalence of breakthrough cases has given purveyors of misinformation an “opportune moment” to exploit, said Kolina Koltai, a researcher at the University of Washington who studies online conspiracy theories. The false narratives “support the whole idea of not trusting the infection numbers or trusting the death count,” she said.

policies that prohibit misinformation that could cause harm to people’s physical health. YouTube said it was reviewing the videos shared by The New York Times in line with its Covid-19 misinformation policies on testing and diagnostics. Twitter said that it had applied a warning to The Gateway Pundit’s article in December for violating its coronavirus misinformation policy and that tweets containing false information about widely accepted testing methods would also violate its policy. But the company said it does not take action on personal anecdotes.

Facebook said it had worked with its fact-checking partners to label many of the posts with warnings that directed people toward fact checks of the false claims, and reduced their prominence on its users’ feeds.

“The challenges of the pandemic are constantly changing, and we’re consistently monitoring for emerging false claims on our platforms,” Aaron Simpson, a Facebook spokesman, said in an email.

No medical test is perfect, and legitimate questions about the accuracy of Covid-19 tests have abounded throughout the pandemic. There has always been a risk of a false positive or a false negative result. The Food and Drug Administration says there is a potential for antigen tests to return false positive results when users do not follow the instructions. Those tests are generally accurate when used correctly but in some cases can appear to show a positive result when exposed to other liquids, said Dr. Glenn Patriquin, who published a study about false positives in antigen tests using various liquids in a publication of the American Society for Microbiology.

“Using a fluid with a different chemical makeup than what was designed means that result lines might appear unpredictably,” said Dr. Patriquin, an assistant professor of pathology at Dalhousie University in Nova Scotia.

Complicating matters, there have been some defective products. Last year, the Australian company Ellume recalled about two million of the at-home testing products that it had shipped to the United States.

But when used correctly, coronavirus tests are considered reliable at detecting people carrying high levels of the virus. Experts say our evolving knowledge of tests should be a distinct issue from lies about testing that have spread widely on social media — though it does make debunking those lies more challenging.

said in July that it would withdraw its request to the Food and Drug Administration for emergency-use authorization of one specific test at the end of the year. Hundreds of other Covid-19 tests are still available from other manufacturers, the C.D.C. later clarified.

Still, posts claiming that the agency had withdrawn support of P.C.R. tests went viral on Facebook. The most widely shared post pushing the falsehood in July collected 11,500 likes, shares and comments, according to data from CrowdTangle, a Facebook-owned social media analytics tool. The post added the falsehood that the C.D.C.’s advisory meant that P.C.R. tests could not distinguish between the coronavirus and the flu, when in fact the agency had simply recommended the use of tests that could simultaneously detect and distinguish between the flu and Covid-19.

Despite being fact-checked within days, the claim never fully went away. The Gateway Pundit article revived the claim at the end of the year, collecting nearly double the earlier post’s likes, shares and comments on Facebook. On Instagram, screenshots of the article also went viral, collecting hundreds of likes.

Mr. Gregory said a similar phenomenon had occurred with social media posts claiming various liquids turned at-home coronavirus tests positive.

On Dec. 23, 2020, a video on YouTube showed coronavirus tests turning positive after being tested on kiwi, orange and berry fruit juice. It collected over 102,000 views. In the same month, a video producing the same results with Coca-Cola was posted on YouTube, collecting 16,800 views.

One year later, a spate of similar videos with the same theme appeared on TikTok and Instagram.

For Ms. Koltai, the re-emergence of false narratives even after social media companies labeled them a year earlier shows the power of misinformation to “thrive when it can latch on to a current event.”

“That is how narratives can peak at different times,” she said.

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Discovery and AT&T: How a Huge Media Deal Was Done

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Deals are rarely smooth, and an anomaly with Discovery’s share price dovetailed with the negotiations. Discovery’s stock began to inexplicably rocket in February and March to $75 from $45 because of a convoluted trading scandal involving Archegos, a little-known private investment firm that bet big on Discovery and other companies via derivatives using billions in borrowed money.

With banks forced to buy shares to hedge their spiraling exposure to Archegos, Discovery’s market value jumped nearly 60 percent, for no obvious reason to outsiders. But by May, the stock had returned to where it was during Mr. Zaslav’s initial approach, and the two sides ultimately forged a deal that gave 71 percent of the new company to AT&T shareholders and 29 percent to Discovery.

Now, the trick was closing it before word could leak out.

One awkward conversation awaiting Mr. Stankey was with Jason Kilar, the former chief of Hulu tapped by AT&T, with great fanfare, just a year earlier to lead WarnerMedia. To mark the occasion of his first anniversary on the job, Mr. Kilar had agreed — with AT&T’s blessing — to be profiled by The Wall Street Journal. He invited a reporter in late April to interview him on the Warner Bros. lot in Burbank, Calif., unaware that across the country, his colleagues were feverishly working to close the deal.

At some point during the week of May 3, Mr. Stankey dropped the bomb: He informed Mr. Kilar that the company would soon change hands, and it was unclear what Mr. Kilar’s role might be. The 2,600-word Journal profile of Mr. Kilar, which included a quote from Mr. Stankey, was published on May 14, three days before the deal was announced.

Usually a cheerful presence on Twitter, Mr. Kilar didn’t bother sharing the article with his 37,000 followers. By the weekend, Mr. Kilar had retained the entertainment power lawyer Allen Grubman to start negotiating his exit.

A little after 7 a.m. on Sunday, Mr. Zaslav boarded a corporate jet at a small airport on the East End of Long Island, not far from his home, to head to AT&T’s Dallas headquarters to put the finishing touches on the deal. But just over an hour into the flight, word got out through Bloomberg’s black-and-orange terminal screens: “AT&T is in talks to combine content assets with Discovery.”

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How a Megadeal Reunited CNN’s Jeff Zucker With a Powerful Old Friend

All agreed that Mr. Zaslav’s takeover raised the odds that Mr. Zucker would stay put, perhaps in an expanded role that encompasses more of Discovery and Warner’s combined news and sports assets. Discovery, for instance, owns Eurosport, a European network with broadcast rights to the Olympics and major tournaments in tennis and golf.

“They were a formidable team when they were together at NBC,” said Jeff Gaspin, a former chairman of entertainment at NBCUniversal who has worked closely with both men. “They’ll make a formidable team at Warner if Jeff chooses to stay.”

The two men started at NBC in the late 1980s. They trained under Jack Welch, the chairman of General Electric, which controlled the media company, and ascended during NBC’s “Must See TV” golden age in the 1990s.

“It was a time that we would look at each other, and we believed that anything was possible,” Mr. Zaslav once said, reflecting on their salad days at NBC. Mr. Zucker eventually became chief executive; Mr. Zaslav left to run Discovery in 2007.

Prickly and blunt, Mr. Zucker is not known for befriending other executives who could become rivals down the road. But he has said he and Mr. Zaslav grew closer after they left NBC. Only a handful of guests were invited to Mr. Zucker’s intimate 50th birthday party in 2015 at a hotel in Lower Manhattan; Mr. Zaslav and his wife, Pam, made the cut.

In 2019, when Mr. Zaslav presented a career achievement award to Mr. Zucker at a starry luncheon in Midtown Manhattan, he called the CNN president “one of the greatest media leaders of all time.”

Inside CNN, the reaction to this week’s merger announcement has been happiness and relief. Mr. Zucker’s loyalists were uneasy about the prospect of his departure, and rumors flew that AT&T, facing a giant debt burden, would consider selling the highly profitable news network, perhaps leaving it in the hands of an owner less than committed to its journalistic mission.

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How AT&T Got Here, and What’s Next.

AT&T is painting a rosy picture for the future of its media business, which it will spin off and merge with Discovery. That new streaming giant is a formidable stand-alone competitor to Netflix and Disney. The move leaves AT&T to focus on its telecom business, which looks less bright after being overshadowed by its expensive — and ultimately futile — deal-making binge in media and entertainment under its previous chief, Randall Stephenson.

The DealBook newsletter explains how AT&T got here, in three key deals:

  • A $39 billion bid to buy T-Mobile. After regulatory pushback, in 2011 AT&T walked away from an effort to become the country’s largest wireless company. T-Mobile paired up instead with Sprint, and the two went on to buy huge amounts of spectrum in the high-stakes battle for 5G, leaving AT&T behind as it lobbies regulators to step in. The failed deal hit AT&T with a $3 billion dollar breakup fee, at the time the largest ever.

  • The $67 billion acquisition of DirectTV. In 2015, AT&T bet on cable TV as a way to amass customers whom it could eventually convert to streaming. But DirectTV bled subscribers as customers cut the cord, and AT&T unloaded a stake in the company last year to TPG that valued DirectTV at about a third of its acquisition price. The deal also cost AT&T about $50 million in advisory fees, according to Refinitiv.

  • The $85 billion acquisition of Time Warner. In 2018, Stephenson called the deal a “perfect match,” but the combined group struggled to invest in its telecom business while also spending enough to compete with the entertainment specialists at Netflix and Disney. Three years later, AT&T is now spinning off the company so it can (re)focus on its quest for 5G market share. AT&T paid $94 million in advisory fees to put the two companies together and an estimated $61 million to split them apart.

buy another independent studio, MGM.

In a sign of the pressure that players face to spend big to bulk up, shares in Comcast, the telecom company that owns NBCUniversal, fell 5.5 percent on Monday.

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AT&T’s WarnerMedia Group to Merge With Discovery

It’s as if Logan Roy, the fictional patriarch of the Waystar Royco media empire on HBO’s popular series “Succession,” masterminded the deal himself: AT&T has thrown in the towel on its media business and decided to spin it off into a new company that will merge with Discovery Inc.

The transaction will combine HBO, Warner Bros. studios, CNN, TNT, TBS and several other cable networks with a host of reality-based cable channels from Discovery such as Oprah Winfrey’s OWN, HGTV, the Food Network and Animal Planet.

But it raises numerous questions about what that will mean for popular shows and streaming platforms, whether entertainment bills will go up or down, or what will happen to the people working at WarnerMedia and Discovery.

WarnerMedia is known for producing some of the industry’s biggest theatrical and television hits.

HBO last year captured more Emmys than any other network, studio or platform, and its hit shows include “Succession,” “Curb Your Enthusiasm” and “Last Week Tonight With John Oliver.” It also has a huge library that includes “The Sopranos,” “Game of Thrones” and “Sex and the City.”

Netflix, the industry leader, has over 200 million subscribers, and everyone else is far behind.

Both WarnerMedia and Discovery have invested heavily in streaming. WarnerMedia has spent billions building HBO Max, which together with the HBO cable network has about 44 million customers. Discovery has 15 million global streaming subscribers, most of them for its Discovery+ app.

The companies plan to invest more in both services to get those numbers much higher. David Zaslav, the chief executive of Discovery, who will run the new business, said on Monday that he envisioned hundreds of millions of subscribers around the world, but that will be tough as Netflix and Disney invest in new shows of their own to keep a grip on the market.

Jason Kilar, who was hired to run AT&T’s media group only last year, is most likely on his way out. He was kept in the dark about the deal until a few days ago, and he has hired a legal team to negotiate his departure, according to two people briefed on the matter.

But it could mean the elevation of other executives within WarnerMedia. On Monday, Mr. Zaslav praised Toby Emmerich, the head of the film division, Casey Bloys, who runs HBO, and Jeff Zucker, the leader of CNN. Mr. Zucker and Mr. Zaslav are also longtime golfing buddies.

When asked about his plan for the management team, Mr. Zaslav said he would not favor Discovery executives.

“Philosophically, our view is we don’t know better,” he said. “There’s a reason WarnerMedia is where it is today.”

The companies expect the deal to be finalized in the middle of next year, and they anticipate annual cost savings of $3 billion. That usually means layoffs are coming.

WarnerMedia already went through several rounds of deep staff cuts after AT&T’s purchase of the company in 2018 as Mr. Stankey, who led the unit for a time, slimmed down the operations. Executives and managers were let go as he combined HBO, Warner Bros., CNN and the other cable networks under a single management team.

When Mr. Kilar came aboard last year, he cut further. Over 2,000 employees were laid off in the process.

To realize $3 billion in cost savings will inevitably mean more layoffs — at both WarnerMedia and Discovery. Mr. Zaslav said there was “a treasure trove of talent” at WarnerMedia, and emphasized the fact that Discovery doesn’t make scripted shows.

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